Euagathis breviantennata van Achterberg & Sharkey, 2014

van Achterberg, Cornelis, Sharkey, Michael J. & Chapman, Eric G., 2014, Revision of the genus Euagathis Szepligeti (Hymenoptera, Braconidae, Agathidinae) from Thailand, with description of three new species, Journal of Hymenoptera Research 36, pp. 1-25 : 8-10

Euagathis breviantennata van Achterberg & Sharkey sp. n.

Type material.

Holotype, ♀ (QSBG), " Thailand: Chiang Mai, Doi Chiang Dao N. P., Headquarter, 19°24.278'N, 98°55.311'E, 491 m elev., Malaise trap, 14-21.viii.2007, S. Jugsu & A. Watwanich" (H928; T5672). Paratypes (3 ♀): 1 ♀ (RMNH), Thailand: "Chiang Mai, Doi Chiang Dao W. S., Pha Trang unit, 19°24.978'N, 98°54.886'E, 526 m elev., Malaise trap, 21-28.x.2007, Songkran & Apichart" (H340); 1 ♀ (HIC), "Chiang Mai Prob., Queen Sirikit Botanic. Garden, 18°52'50.7"N, 98°51'42.3"E, alt. 811 m elev., by Malaise trap, 9-16.vi.2009, semi-evergreen forest, K. Kaewjanta et al. QSBG-2009-125" (H694); 1 ♀ (QSBG), "Nakhon Si Thammarat, Namtok Yong N. P., behind lavatory, 8°10.397'N, 99°44.503'E, 95 m elev., Malaise trap, 26.v.-2. vi.2009, U-prai K." (H431); 1 ♀ (HIC) Chiang Mai, Doi Chiangdao NP, Pha Tang substation, 19.416°N, 98.915°E, 526 m elev., Malaise trap, 28.viii-4.ix.2007, S. Jugsu & A. Watwanich (H4107).

Diagnosis.

This new species keys to Euagathis fuscinotum Enderlein, 1920, from the Sunda area (Java, Sumatra, Borneo, West Malaysia) in the key by Simbolotti and van Achterberg (1995). Females of both species have the segments of the apical half of the antenna about as long as wide. Euagathis breviantennata sp. n. differs by having the hind femur punctate-rugose ventrally (coarsely punctate in Euagathis fuscinotum ), third antennal segment of female about twice as long as wide (about 3 times), setae of middle tarsus about as long as width of tarsal segments (about half as long as width of segments), anterior crenulae of precoxal sulcus long (short to medium-sized), head normally triangular in anterior view and about 1.2 times wider than high (eyes strongly protruding, head about 1.4 times wider than high in female), apical half of fore wing with yellowish tinge (without yellowish tinge) and first tergite comparatively elongate and 1.7-2.2 times as long as wide apically (comparatively short and 1.4-1.9 times as long as wide apically).

Description.

Holotype, ♀, length of body 8.2 mm, of fore wing 7.9 mm, of ovipositor sheath 0.8 mm.

Head. Antennal segments 45, length of third segment 1.3 times fourth segment, length of third, fourth and penultimate segments 2.2, 1.8 and 1.0 times their width, respectively; apical antennal segment as long as penultimate segment; maxillary palp 0.6 times height of head; malar space 2.8 times as long as basal width of mandible; length of eye 2.1 times temple; temple directly narrowed posteriorly and slightly concave laterally; POL:OD:OOL = 6:5:9; face shiny with shallow medial groove dorsally, spaced punctulate and setose; frons, vertex and temple shiny and smooth ( Fig. 6d ); temple concave near lower level of eye.

Mesosoma. Length of mesosoma 1.4 times its height; pronotum smooth, but setose and punctulate dorsally and finely crenulate posteriorly; area near lateral carina of mesoscutum smooth; mesoscutum shiny, with spaced and rather coarse punctures and lateral lobes distinctly convex posteriorly ( Fig. 6g ); notauli complete, smooth or nearly so; scutellum convex and densely coarsely punctate, antero-dorsal margin rounded and without transverse carina; precoxal sulcus complete and anterior crenulae long ( Fig. 6f ); mesopleuron and metapleuron medially coarsely punctate with interspaces equal to diameter of punctures or wider; propodeum coarsely areolate, anterior face about as long as posterior face.

Wings. Fore wing: second submarginal cell pentagonal and with short ramellus ( Fig. 6b ); vein SR1 straight; r:3-SR:SR1 = 4:1:72; vein 2-R1 0.5 times as long as 1-R1; vein cu-a slightly antefurcal; no stigmal spot. Hind wing: vein M+CU 3.2 times as long as vein 1-M; area near vein cu-a glabrous.

Legs. Length of hind femur, tibia and basitarsus 4.9, 8.3 and 7.6 times their width, respectively; hind femur punctate-rugose ventrally; setae of middle tarsus about as long as width of tarsal segments; fore and middle tarsal segments moderately slender; length of outer and inner spur of middle tibia 0.6 and 0.8 times middle basitarsus, respectively; outer side of middle tibia without pegs, except for 1 apical peg; length of outer and inner spur of hind tibia 0.4 and 0.6 times hind basitarsus.

Metasoma. First tergite 1.9 times as long as wide apically, smooth, moderately elongate and apically widened ( Fig. 6h ); second metasomal suture absent; ovipositor sheath 0.1 times as long as fore wing, truncate apically and somewhat widened ( Fig. 6a ).

Colour. Black; head, scapus and pedicellus (both partly darkened), palpi, mesosoma (but mesopleuron (except anteriorly), metapleuron and propodeum black and mesosternum largely dark brown) and fore and middle legs, yellowish-brown; basal half of metasoma largely ivory ventrally and laterally, apical half of metasoma largely dark brown, but hypopygium with ivory patch medially; pterostigma and veins brown; wing membrane brownish with a yellowish tinge ( Fig. 6b, c ); apex of ovipositor sheath ivory.

Variation. Length of fore wing 5.9-7.9 mm; length of ovipositor sheath 0.11-0.12 times as long as fore wing; antennal segments of female 40(1), 44(1) or 45(1); first metasomal tergite 1.7-2.2 times as long as its apical width; mesosternum and mesopleuron ventrally largely dark brown or yellowish-brown.

Biology.

Unknown.

Distribution.

Only known from Thailand. For a distribution map, see Appendix.

Molecular data.

Genbank accession numbers: KC867218 (28S).

Etymology.

From “brevis” (Latin for “short”) and “antenna” (Latin for "sailyard, feeler") because of the short antenna of the female.

Figures

Figure 6. Euagathis breviantennata sp. n., female, paratype. A lateral habitus B fore wing C hind wing D dorsal head E lateral head F lateral mesosoma G dorsal thorax H postero-lateral propodeum and anterior metasoma.