taxonID	type	description	language	source
039C87AE3043DF23FE0D8BBFDDC492D4.taxon	description	Fig. 1	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3043DF23FE0D8BBFDDC492D4.taxon	diagnosis	Diagnosis Idris bianor Sushama, Rajmohana & Debnath sp. nov. can be distinguished from other Oriental species at once by the presence of black lateral patches on T 1 – T 4. In the identification key for the species of Idris in India (Rajmohana 2014), this species keys to I. munnarensis Mukerjee, 1978, but can be separated from the latter by its smaller A 3 (0.3 × of A 2 length vs 0.6 × of A 2 length), longitudinal parallel costae extending to ¾ of T 2 medially (in I. munnarensis, costate only basally) and by the presence of black lateral patches on metasoma (in I. munnarensis, absent). In the species identification key of Lê (2000), this species runs to I. nautalis Kozlov & Lê, 1987; however, I. bianor can be distinguished from the latter by the shorter metasoma (1.3 × as long as wide vs 2 × as long as wide), presence of black lateral patches on T 1 – T 4 (in I. nautalis, absent), and the absence of longitudinal striae on T 3 (in I. nautalis, present). While much similar to I. javensis (Girault, 1917), I. bianor differs mainly by the presence of black lateral patches on T 1 – T 4 and the presence of a central keel on frons.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3043DF23FE0D8BBFDDC492D4.taxon	etymology	Etymology The specific epithet is after spider host of genus Bianor G. W. Peckham & E. G. Peckham, 1886 (Araneae: Salticidae) and is intended as a noun in apposition.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3043DF23FE0D8BBFDDC492D4.taxon	materials_examined	Type material Holotype INDIA • ♀; West Bengal, East Burdwan, Kalna; 23.244 ° N, 87.897 ° E; 52 m alt.; 10 Oct. 2022; Rupam Debnath leg.; ex eggs of Bianor angulosus (Karsch, 1879); ZSI / 34210 / H 3. Paratypes INDIA – West Bengal • 5 ♀♀; South 24 Parganas, Raidighi; 21.9965 ° N, 88.4365 ° E; 26 m alt.; 21 Nov. 2021; V. Sushama leg.; ex eggs of Bianor angulosus (Karsch, 1879); ZSI / 34211 / H 3 to ZSI / 34215 / H 3 • 2 ♀♀; South 24 Parganas, Patharpratima; 21.7355 ° N, 88.4102 ° E; 20 m alt.; 26 Nov. 2022; V. Sushama leg.; ZSI / 34216 / H 3, ZSI / 34217 / H 3 • 2 ♀♀; South 24 Parganas, Kakdwip; 21.8866 ° N, 88.1705 ° E; 13 m alt.; 9 Nov. 2023; V. Sushama leg.; ex eggs of B. albobimaculatus (Lucas, 1846); ZSI / 34218 / H 3, ZSI / 34219 / H 3 • 3 ♀♀; Murshidabad, Ekghoria; 23.9122 ° N, 87.96501 ° E; 42 m alt.; 24 Oct. 2022; Rupam Debnath leg.; ex eggs of B. angulosus (Karsch, 1879); ZSI / 34220 / H 3 to ZSI / 34222 / H 3 • 8 ♀♀; same data as for holotype; ZSI / 34223 / H 3 to ZSI / 34230 / H 3 • 3 ♂♂; same data as for holotype; ZSI / 34231 / H 3 to ZSI / 34233 / H 3.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3043DF23FE0D8BBFDDC492D4.taxon	description	Description Female BODY LENGTH. 0.65 – 0.92 mm (n = 20). COLOUR. Head light brown; mesoscutum, mesoscutellum brown except reddish brown mesoscutellar lateral margins; metasoma, mandibles, legs and antennae pale yellow except brownish black patches laterally on T 1 – T 3 and posterolaterally towards median of T 4; propodeum black; wings hyaline; setae on body white. HEAD. 1.7 × as wide as high; 1.1 × as high as long; 2.0 × as wide as long; HW / TSL = 1.4; IOS 0.5 × HW; head including frons, vertex, gena reticulate with scattered setae; central keel incomplete, reaching up to lower eye margin; lagrimal small, smooth; facial striae absent; malar striae absent; eyes sparsely pubescent; mandible tridentate, upper tooth longest; lateral ocelli contiguous with orbital margin; POL> LOL in ratio of 2: 1; POL 9.0 × OD; hyper occipital carina absent; occipital carina complete; A 1 4.0 × as long as wide; A 1 and clava subequal to equal in length; A 2 2.7 × A 3 in length; A 3 subequal in length and width; proportions of length to width of A 1 to A 6 (101: 24), (48: 24), (18: 14), (10: 15), (7: 14), (5: 22); clava 2.0 × as long as wide. MESOSOMA. Mesoscutum and mesoscutellum 0.7 × and 0.5 × as long as wide respectively and with same sculpture as on vertex; notauli absent; mesoscutal suprahumeral sulcus and mesoscutal humeral sulcus absent; scutoscutellar sulcus foveolate laterally in axillar area and smooth medially; posterior mesoscutellar sulcus foveolate; metascutellum smooth; metanotal trough foveolate; propodeum longitudinally striated submedially, placed apart by 3.0 × of its own width; pronotal suprahumeral sulcus absent; epomial carina absent; cervical pronotal area with same sculpture as on vertex; lateral pronotal area smooth; mesopleural pit present; mesopleural carina incomplete, restricted to anterior half; prespecular sulcus foveolate; mesepimeral sulcus foveolate up to mesopleural pit and then present as a strong carina towards mesocoxa; femoral depression smooth; dorsal and ventral metapleural area smooth; metapleural pit distinct, from which metapleural sulcus extends as a smooth furrow anteriorly towards posterior margin of mesopleuron and posteriorly towards posterior margin of metapleuron; metapleural sulcus foveolate anterodorsally; paracoxal sulcus present as a simple furrow. WINGS. Macropterous; forewing (L: W = 45: 14), m: pm: st = 2: 1: 3; hindwing (L: W = 35: 6). METASOMA. 1.3 × as long as wide. T 1 with longitudinal parallel costae throughout; T 2 longitudinally costate up to ¾ of its length medially and decreasing in length laterally, finely reticulate laterally, smooth apically; T 3 longest and widest of all tergites, 2.1 × as long as T 2, with fine reticulation, sparsely setose laterally and sub laterally, smooth apically; T 4 and T 5 reticulate basally, smooth apically, sparsely setose; T 6 and T 7 not visible in dorsal view; proportions of width to length of T 1 to T 5 (102: 42), (144: 72), (241: 156), (212: 47), (134: 18); S 1 longitudinally costate; S 2 longitudinally costate basally; S 3 – S 6 uniformly reticulate and moderately setose. Male Body length = 0.79 mm (n = 3). Morphologically similar to females with the main exception of antenna. Antenna 11 - merous, last two segments fused, length to width ratio of A 1 – A 11 (10: 3), (6: 3), (2: 2), (2: 3), (2: 3), (2: 3), (2: 3), (2: 3), (2: 3), (2: 3), (7: 3).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3043DF23FE0D8BBFDDC492D4.taxon	biology_ecology	Biology Reared from the eggs of Bianor angulosus and B. albobimaculatus (Salticidae: Araneae) (Rajmohana et al. 2025).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3043DF23FE0D8BBFDDC492D4.taxon	distribution	Distribution West Bengal (India), Pakistan (based on BLAST search).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3043DF23FE0D8BBFDDC492D4.taxon	discussion	Variation Difference in female body length (see the description above) and metasoma of some females comparatively short, 1.1 × as long as wide. Molecular characterization The mt COI sequences of I. bianor (GenBank: OR 621048, OR 621049, OR 699988 – OR 699993, PP 417915, PP 426041) show a minimum genetic distance of 11.4 % to an unidentified species of Idris from Canada (GenBank: MG 514562). The intraspecific genetic distance ranged from 0.0 to 0.3 % (Supp. file 2). Interestingly, the BLAST search of I. bianor sequence retrieved 100 % similarity to a sequence of an unpublished scelionid specimen from Pakistan (BOLD: GMPJA 9337 - 21).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3044DF2EFE0C8BA5DBC49162.taxon	description	Fig. 2	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3044DF2EFE0C8BA5DBC49162.taxon	diagnosis	Diagnosis Following Rajmohana (2014), I. furvus Sushama, Rajmohana & Debnath sp. nov. comes close to I. dubarensis Mukerjee, 1981 but can be separated from the latter by sculpture of head (imbricate vs coriaceous), body colour (black vs brownish yellow), smaller T 3 (<2.0 × T 2 length vs> 2.5 × of T 2 length) and absence of a transverse darker band in the forewing (in I. dubarensis, present). Based on the body colour, sculpture of head and other morphological characters, this species resembles I. hirsutus Sunita & Rajmohana, 2024. However, I. furvus can be distinguished from I. hirsutus by its complete mesopleural carina (in I. hirsutus, restricted to anterior half), wider head (2.3 × as wide as long vs 1.8 × as wide as long) and shorter T 3 (1.9 × of T 2 length vs 2.5 × of T 2 length). In the species identification key of Lê (2000), this species runs to I. denkis Kozlov & Lê, 1987; however, I. furvus can be distinguished from the latter by metasomal sculpture. In I. furvus, T 2 is with longitudinal costae up to ¾ of its length (in I. denkis, T 2 with only a row of basal fovea), T 3 finely striated medially and reticulate laterally (in I. denkis, T 3 entirely finely reticulate) and lacks facial striae (in I. denkis, present). While much similar to I. luteipes (Crawford, 1910) from the Oriental region, I. furvus can be distinguished mainly by pleural sculpture. In I. furvus, the episternal foveae are absent (present in I. luteipes), the posterodorsal metaplural sulcus present as a simple furrow (foveolate in I. luteipes) and the paracoxal sulcus is smooth (foveolate in I. luteipes).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3044DF2EFE0C8BA5DBC49162.taxon	etymology	Etymology The specific epithet is after the Latin word ‘ furvus ’ = ‘ black’, due to the black body colour. It is intended as an adjective in apposition.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3044DF2EFE0C8BA5DBC49162.taxon	materials_examined	Type material Holotype INDIA • ♀; West Bengal: South 24 Parganas, Raidighi; 21.9965 ° N, 88.4365 ° E; 26 m alt.; 28 Nov. 2022; V. Sushama leg.; ZSI / 34234 / H 3. Paratype INDIA • 1 ♀; same data as for holotype; ZSI / 34235 / H 3.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3044DF2EFE0C8BA5DBC49162.taxon	description	Description Female (holotype) BODY LENGTH. 1.23 mm. COLOUR. Head, mesosoma black; legs and antennae honey brown except dark brown tip of clava; metasoma brownish black except for reddish brown T 1 and basal portion of T 2; mandibles, posterior scutellar area reddish brown; wings hyaline; setae on body white. HEAD. 1.1 × as wide as high; 1.1 × as high as long; 2.3 × as wide as long; HW / TSL = 1.1; IOS 0.5 × of HW; head including vertex, frons finely imbricate with dense setae; gena setigerous punctate; antennal scrobe with fine transverse reticulations ventrally, mildly smooth dorsally; central keel incomplete, reaching up to lower eye margin; lagrimal small, smooth; facial striae absent; malar striae absent; eyes densely pubescent; mandible tridentate, teeth of equal size; lateral ocelli contiguous with orbital margin; POL> LOL in ratio of 158: 67; POL about 7.8 × of OD; hyper occipital carina absent; occipital carina complete. A 1 3.7 × as long as wide, 1.1 × of clava in length; A 2 3.1 × A 3; A 3 subequal in length and width; proportions of length to width of A 1 to A 6 (116: 31), (59: 27), (18: 19), (13: 19), (12: 19), (9: 23); clava 1.8 × as long as wide. MESOSOMA. Mesoscutum and mesoscutellum 0.7 × and 0.6 × as long as wide respectively, with same sculpture as on vertex; notauli absent; mesoscutal suprahumeral sulcus and mesoscutal humeral sulcus absent; scutoscutellar sulcus foveolate laterally towards axillula and furrow like medially; posterior mesoscutellar sulcus foveolate; metascutellum smooth; metanotal trough foveolate; propodeum with irregular longitudinal striae dorsally, medially with 2 tooth-like projections; pronotal suprahumeral sulcus absent; epomial carina absent; cervical pronotal area with same sculpture as on vertex; lateral pronotal area smooth; mesopleural pit present; mesopleural carina complete; prespecular sulcus and mesepimeral sulcus present as continuous transverse striae, extending up to mesopleural pit; femoral depression smooth; mesopleural epicoxal sulcus present; dorsal and ventral metapleural area smooth; metapleural pit distinct; metapleural sulcus foveolate anterodorsally; ventral portion of paracoxal sulcus present as a simple furrow. WINGS. Macropterous; forewing (L: W = 64: 26); m: pm: st = 4: 3: 8; hindwing (L: W = 54: 14). METASOMA. 1.4 × as long as wide; T 1 concave anteriorly, with longitudinal parallel costae throughout and a pair of lateral setae; anteromedial portion of T 2 smooth and convex, longitudinally costate up to ¾ of T 2 length medially and decreasing in length laterally, apically smooth; T 3 longest and widest of all tergites, 1.9 × as long as T 2, longitudinally striate up to ¾ of its length medially and finely reticulate laterally, sparsely setose in lateral, sublateral and apical portion; T 4 and T 5 finely intricate, moderately setose; T 6 and T 7 not visible dorsally; proportions of width to length of T 1 to T 5 (125: 56), (165: 103), (281: 202), (284: 62), (163: 29); S 1 longitudinally costate; S 2 longitudinally costate basally, S 3 – S 6 with moderately dense setae. Male Unknown.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3044DF2EFE0C8BA5DBC49162.taxon	biology_ecology	Biology Host unknown.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3044DF2EFE0C8BA5DBC49162.taxon	distribution	Distribution West Bengal (India).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3044DF2EFE0C8BA5DBC49162.taxon	discussion	Variation No variation was observed in the specimens examined. Molecular characterization The mt COI sequences of I. furvus (GenBank: OR 960561, OR 960564) show a minimum genetic distance of 7.8 % to I. hirsutus (GenBank: OR 699986).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3049DF2DFE0C88CEDD8C9786.taxon	description	urn: lsid: zoobank. org: act: 66 AF 4 D 22 - 8 F 6 C- 49 C 0 - AC 38 - 3 A 1980 EEDC 8 C Fig. 3	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3049DF2DFE0C88CEDD8C9786.taxon	diagnosis	Diagnosis In the key to species of Idris known from India (Rajmohana 2014), I. hyllus Debnath, Rajmohana & Sushama sp. nov, comes close to I. hunnaheus (Mani, 1973), but can be separated from the latter by the shorter T 3 (1.6 × of T 2 length vs 2.2 × of T 2 length), shorter scape (3.3 × longer than wide vs 4.2 × longer than wide), shorter pedicel (1.3 × longer than wide vs 2.1 × longer than wide) and by the presence of longitudinal parallel costae extending to the 3 / 4 th of T 2 medially (in I. hunnahaeus, T 2 entirely longitudinally costate). In the species identification key of Lê (2000), this species runs to I. nautalis Kozlov & Lê, 1987; however, I. hyllus can be distinguished from the latter by shorter metasoma (1.4 × as long as wide vs 2.0 × as long as wide), T 2 with longitudinal costate up to half of its length medially (in I. nautalis, T 2 entirely longitudinally costate) and the absence of longitudinal striae on T 3 (in I. nautalis, present). While much similar to I. fasciatipennis (Girault, 1917), Idris hyllus differs from the former by the longer A 1 (4.8 × in I. hyllus vs 3.4 × in I. fasciatipennis) and shorter clava (1.8 × as long as wide in I. hyllus vs 2.5 × as long as wide I. fasciatipennis).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3049DF2DFE0C88CEDD8C9786.taxon	etymology	Etymology The specific epithet is after its host, Hyllus semicupreus (Simon, 1885) and is intended as a noun in apposition.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3049DF2DFE0C88CEDD8C9786.taxon	materials_examined	Type material Holotype INDIA • ♀; West Bengal: Darjeeling, Hansqua; 26.63992 ° N, 88.310141 ° E; 150 m alt.; 14 Dec. 2022; Rupam Debnath leg.; ex eggs of Hyllus semicupreus (Simon, 1885); ZSI / 34236 / H 3. Paratypes INDIA • 9 ♀♀; same data as for holotype; ZSI / 34237 / H 3 to ZSI / 34245 / H 3.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3049DF2DFE0C88CEDD8C9786.taxon	description	Description Female BODY LENGTH. 0.85 – 0.90 mm (n = 10). COLOUR. Head and mesosoma honey brown to yellow; antenna, metasoma, legs, mandibles pale yellow except for the reddish-brown mandible tip; wings hyaline except clouded behind the st; setae on body white. HEAD. 1.6 × as wide as high; 1.2 × as high as long; HW / TSL = 1.1; IOS 0.5 × HW; head including frons, vertex, gena evenly imbricate throughout, densely setose; central keel incomplete, extending hardly up to lower level of eye margin; lagrimal small, smooth; facial striae absent; malar striae absent; eyes densely pubescent; mandible tridentate, middle tooth smaller than upper and lower tooth; lateral ocelli contiguous with orbital margin; POL> LOL in ratio of 15: 8; POL 7.5 × of OD; hyper occipital carina absent; occipital carina complete; A 1 4.7 × as long as thick; A 1 1.2 × as long as clava; A 2 2.7 × of A 3 in length; A 3 subequal in length and width; proportions of length to width of A 1 to A 6 (144: 30), (41: 28), (15: 20), (10: 20), (9: 19), (9: 23); clava 1.8 × as long as wide. MESOSOMA. Mesoscutum and mesoscutellum 0.8 × and 0.6 × as long as wide respectively, finely granulose and moderately setose; notauli absent; mesoscutal suprahumeral sulcus and mesoscutal humeral sulcus absent; scutoscutellar sulcus foveolate laterally in axillar area and smooth medially; posterior mesoscutellar sulcus foveolate; metascutellum smooth; metanotal trough foveolate; propodeum with irregular longitudinal striae; pronotal suprahumeral sulcus absent; epomial carina distinct; cervical pronotal area granulate; lateral pronotal area smooth; mesopleural pit present; mesopleural carina incomplete, restricted to anterior half; femoral depression smooth; prespecular sulcus foveolate; mesepimeral sulcus foveolate up to mesopleural pit and then present as a strong carina towards mesocoxa; episternal foveae present, one in number; dorsal and ventral metapleural area smooth; metapleural pit distinct, from which metapleural sulcus extends as a smooth furrow anteriorly towards posterior margin of mesopleuron and posteriorly towards posterior margin of metapleuron; metapleural sulcus foveolate anterodorsally; paracoxal sulcus present as a simple furrow. WINGS. Macropterous; forewing (L: W = 67: 23), m: pm: st = 4: 5: 9; hindwing (L: W = 56: 6). METASOMA. 1.4 × as long as wide. T 1 with longitudinal parallel costae throughout, two lateral setae on each side; T 2 longitudinally costate up to almost ¾ of its length medially and decreasing in length laterally, rest smooth, very sparsely setose laterally and sublaterally; T 3 longest and widest of all tergites, 3.0 × as long as T 2, with fine coriaceous sculpture and irregular longitudinal rugulae extending almost ¾ of T 3 medially, setose laterally and sub laterally, smooth apically; T 4 and T 5 imbricate and sparsely setose; T 6 and T 7 not visible in dorsal view; proportions of width to length of T 1 to T 5 being (124: 51), (204: 110), (310: 180), (312: 50), (203: 25); S 1 longitudinally costate; S 2 with a row of fovea basally, followed by longitudinal parallel costae throughout; S 3 – S 6 reticulate, moderate to densely setose. Male Unknown.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3049DF2DFE0C88CEDD8C9786.taxon	biology_ecology	Biology Reared from the eggs of Hyllus semicupreus (Salticidae: Araneae) (Rajmohana et al. 2025).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3049DF2DFE0C88CEDD8C9786.taxon	distribution	Distribution West Bengal (India).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE3049DF2DFE0C88CEDD8C9786.taxon	discussion	Variation Very little in the material examined, except for differences in female body length (see the description above). Molecular characterization The COI sequences (GenBank: PP 081609, PP 081610) of I. hyllus show a minimum genetic distance of 12.3 % to an unidentified species of Idris from Costa Rica (BOLD: JCCCH 685 - 16).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE304ADF28FE6B8E93DA7796A5.taxon	description	urn: lsid: zoobank. org: act: B 28 FCAA 7 - B 75 F- 4428 - 9 ADD- 637944507375 Fig. 4	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE304ADF28FE6B8E93DA7796A5.taxon	diagnosis	Diagnosis In the species identification key of Rajmohana (2014), Idris longiscapus Debnath, Rajmohana & Sushama sp. nov. comes close to I. lakshmani (Mani, 1939). Since the types of I. lakshmani could not be traced, species comparison was made using the original description. Idris longiscapus can be distinguished from the latter by the colour of the head (black vs honey brown to yellow), smaller HW / HH (1.4 × vs 2.0 ×), and longer pm (equal to m vs half of m). In the species identification key of Lê (2000), this species runs to I. hunnus Kozlov & Lê, 1987; however, I. longiscapus can be distinguished from the latter by the colour of metasoma (pale yellow vs black), sculpture of metapleural epicoxal sulcus (smooth vs foveolate) and shorter T 3 (1.6 × of T 2 length vs 2.2 × of T 2 length). Among the other Oriental species of Idris, I. longiscapus shows similarity to I. fasciatipennis in having the forewings clouded behind the st. Although the types of I. fasciatipennis are damaged and the species description is insufficient, the elongate scape provides an immediate distinguishing feature, with I. longiscapus having a scape 5.6 × as long as wide compared to 3.4 × as long as wide in I. fasciatipennis.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE304ADF28FE6B8E93DA7796A5.taxon	etymology	Etymology The specific epithet ‘ longiscapus ’ is derived from the Latin words ‘ longus ’ (long) and ‘ scapus ’ (scape), referring to the elongated scape characteristic of this species. It is intended as an adjective in apposition.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE304ADF28FE6B8E93DA7796A5.taxon	materials_examined	Type material Holotype INDIA • ♀; West Bengal: Bankura, Nobanda; 22.271164 ° N, 87.141502 ° E; 110 m alt.; 2 Nov. 2023; Rupam Debnath leg.; ex eggs of Harmochirus brachiatus (Thorell, 1877); ZSI / 34246 / H 3. Paratypes INDIA • 8 ♀♀; same data as for holotype; ZSI / 34247 / H 3 to ZSI / 34254 / H 3 • 1 ♂; same data as for holotype; ZSI / 34255 / H 3.	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE304ADF28FE6B8E93DA7796A5.taxon	description	Description Female BODY LENGTH. 0.88 – 0.94 mm (n = 9). COLOUR. Head, mesosoma, lateral patches on T 2 brownish black; metasoma honey brown except T 4 – T 7 brown; mandibles, legs, antennae yellow; wings hyaline except slightly clouded behind the st; setae on body white. HEAD. 1.2 × as wide as high; 1.4 × as high as long; 1.8 × as wide as long; HW / TSL = 1.4; IOS 0.4 × HW; head including vertex setigerous granulate except reticulate antennal scrobe; central keel incomplete, reaching up to mid-level of eye; lagrimal small, smooth; facial striae absent; malar striae absent; eyes densely pubescent; mandible tridentate, middle tooth longer than upper and lower tooth; lateral ocelli contiguous with orbital margin; POL> LOL in ratio of 2: 1; POL 6.5 × OD; hyper occipital carina absent; occipital carina complete; A 1 5.6 × as long as wide, 0.8 × of clava in length; A 2 2.5 × of A 3 in length; A 3 1.2 × as long as wide; proportions of length to width of A 1 to A 6 (113: 20), (54: 27), (21: 17), (13: 19), (12: 20), (12: 24); clava 2.1 × as long as wide. MESOSOMA. Mesoscutum and mesoscutellum 0.7 × and 0.5 × as long as wide respectively; mesoscutum finely imbricate, densely setose; mesoscutellum granulose, sparsely setose; notauli absent; mesoscutal suprahumeral sulcus and mesoscutal humeral sulcus absent; scutoscutellar sulcus foveolate laterally in axillar area and smooth medially; posterior mesoscutellar sulcus foveolate; metascutellum smooth; metanotal trough foveolate; propodeum with longitudinal striae, placed apart by 3.0 × of its own width, medially with 2 tooth-like projections; pronotal suprahumeral sulcus absent; epomial carina absent; cervical pronotal area granulose; lateral pronotal area smooth; mesopleural pit present; mesopleural carina incomplete, restricted to anterior half; prespecular sulcus foveolate; mesepimeral sulcus foveolate up to mesopleural pit and then present as a strong carina towards mesocoxa; femoral depression smooth; ventral and dorsal metapleural area smooth; metapleural pit distinct, from which metapleural sulcus extends as a smooth furrow anteriorly towards posterior margin of mesopleuron and posteriorly towards posterior margin of metapleuron; metapleural sulcus foveolate anterodorsally; paracoxal sulcus present as a simple furrow. WINGS. Macropterous; forewing (L: W = 67: 24), m: pm: st = 2: 2: 9; hindwing (L: W = 64: 8). METASOMA. 1.4 × as long as wide; T 1 with longitudinal parallel costae throughout; T 2 with longitudinal parallel costae extending to half of its length, finely reticulate laterally, smooth apically, moderately setose laterally. T 3 longest and widest of all tergites, 2.2 × as long as T 2 with fine reticulation, smooth apically, sparsely setose laterally and sub laterally; T 4 imbricate basally, smooth apically, sparsely setose; T 5 smooth; T 6 and T 7 not visible in dorsal view; proportions of width to length of T 1 to T 5 (107: 50), (147: 81), (248: 180), (213: 36), (123: 6); S 1 longitudinally costate; S 2 with a row of fovea basally followed by longitudinal parallel costae reaching up to ⅔ of its length, reticulate laterally, smooth apically; S 3 – S 6 reticulate, moderate to densely setose. Male Body length = 0.84 mm. Morphologically similar to females with the main exception of antenna. Antenna 12 - merous, length to width ratio of A 1 – A 12 (13: 3), (6: 3), (4: 3), (4: 3), (4: 3), (4: 3), (4: 3), (4: 3), (4: 3), (4: 4), (3: 3), (6: 4).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE304ADF28FE6B8E93DA7796A5.taxon	biology_ecology	Biology Reared from the eggs of Harmochirus brachiatus (Salticidae: Araneae) (Rajmohana et al. 2025).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE304ADF28FE6B8E93DA7796A5.taxon	distribution	Distribution West Bengal (India), Pakistan (based on BLAST search).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
039C87AE304ADF28FE6B8E93DA7796A5.taxon	discussion	Variation Some of the females have T 2 smooth basally and then entirely longitudinally costate. In addition, differences in female body length are noted (see description above). Molecular characterization The mt COI sequence of I. longiscapus (GenBank: PP 574570) shows a minimum of 12.2 % genetic distance to an unidentified species of Idris from Canada (GenBank: MG 514562). Interestingly, the BLAST search of I. longiscapus sequence retrieved 99.8 % similarity to a sequence of unpublished scelionid specimen from Pakistan (GenBank: KY 842170).	en	Sushama, V., Debnath, Rupam, Rajmohana, K., Dinesh, K. P. (2025): Description of four new species of Idris Förster, 1856 (Hymenoptera: Scelionidae) from India. European Journal of Taxonomy 997: 256-274, DOI: 10.5852/ejt.2025.997.2937, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2937/13271
