Orgilonia ashmeadi ( Viereck, 1911 )

Ahmed, Ishtiaq, Kazmi, Sarfrazul Islam & Rameshkumar, Anandhan, 2022, New record of Orgalonia van Achterberg and description of a new species of Orgilus Haliday (Hymenoptera: Braconidae: Orgilinae) from India, Zootaxa 5195 (5), pp. 437-448 : 438-441

Orgilonia ashmeadi ( Viereck, 1911)

Orgilus ashmeadi Viereck, 1911: 477 ; Shenefelt, 1970: 253; Papp, 1981: 26; van Achterberg, 1987: 15, comb. nov.

Female: Body length= 3.7 mm; fore wing 3.3 mm, width=1.0 mm; hind wing length= 2.3 mm, width= 0.5 mm.

Diagnosis. Occipital carina present ventrally up to half of eye height; malar space less than the basal width of mandible; first tooth of mandible not surpassing the second in dorsal view ( Figs 2B &C ); first metasomal tergite 2.0–2.5 × as long as its apical width; dorsal carinae of first tergite well developed ( Fig. 2K ); ovipositor sheath 0.7–0.8 × fore wing length; hind wing 1-M more than 6.0 × the vein 1r-m; hind wing cu-a oblique; hind wing vein C+SC+R with few stout bristles marginally; vein 1-SC+R of hind wing ends near level of vein SR ( Fig. 2G ); prepectal carina strong and close to anterior margin of mesopleuron; precoxal sulcus narrowly impressed ( Fig. 2E ); second metasomal suture wider and crenulate ( Fig. 2H ); apex of tibia with three pegs; ventral half of outer side of tibia with about 14 bristles; Ovipositor sheath about as long as or a little longer than metasoma and 1.5 × fore wing length.

Redescription

Colour: head yellow, mandibular teeth brown, mesoscutum brownish, rest of the thorax yellow, wings transparent, vein C+SC+R brown, rest of veins yellow, pterostigma yellowish brown, fore leg uniformly brown, hind trochantellus, tibia and tarsi brownish, propodeal carinae brown; first abdominal tergite brown all other tergites brown anteriorly and yellowish posteriorly, ovipositor sheath dark brown, and ovipositor yellow.

Head ( Figs 2 A–C ) 0.4 mm in length, wider than high, more than half as long as wide, face and frons uniformly setose, second tooth medium sized, longer than or equal to half the length of first one, face as wide as frons, wider than long; clypeus more than twice as wide as long, the ventral margin of clypeus straight; eyes higher than wide, dorsal eye length 4.5 × temple, temple less convex in dorsal view; OOL: POL: OD=2:1:1; malar space about 1.3 × basal width of mandible; maxillary and labial palps 5 and 4 segmented respectively, length of maxillary palp 1.2 × head height; antenna longer than body, with 45 antennomeres, scape shorter ventrally, 2.2 × as long as wide, pedicel 1.2 × as long as wide ( Fig. 2D ).

Mesosoma ( Figs 2E–F ) 1.3 mm long, twice as long as high, mesoscutum sparsely setose with well-marked notauli bearing few longitudinal carinae anteriorly, scutellar lobe raised and triangular; fore wing length 3.3 mm, pterostigma 3.75 × as long as wide, 0.66 × vein C+SC+R and 1.2 × the M+CU; RS +Ma absent or weakly present, 2.5 × as long as the RS+Mb= r, the cross vein r-m absent, sub basal cell of fore wing uniformly densely setose, cu-a postfurcal; hind wing long (2.3 mm) and narrow, C+SC+R 0.36 × the SC+R, M+CUa as long as 0.54 × 1-M, r-m very small 0.2 × 1-M, R1 with five stout bristle towards the end ( Fig. 2G ). Hind coxa about 3.0 × as long as wide, sparsely setose, hind femur more than 6.0 × as long as wide, hind tibial spurs prominent, inner tibial spur 1.5 × as long as the outer spur, about half basitarsus length and longer than telotarsus, basal tarsal lobe simple without any angulate protuberance ( Fig. 2M ); propodeum smooth with a pair of prominent lateral spiracles anteriorly and two lateral longitudinal carinae, basally extending up to less than half of the propodeal length, faintly form a trapezoidal shape which extends anteriorly into less prominent medial carina; mesopleuron and metapleuron smooth and uniformly sparsely setose ( Fig. 2E ).

Metasoma ( Figs 2H–K ) 2.1 mm in length, 5.3 × as long as wide, reticulo-punctate throughout dorsally. The first metasomal tergite, narrow anteriorly and broad posteriorly, with two lateral longitudinal posteriorly diverging carinae extending up to 75% of its length, 2.5 × as long as its apical width; spiracle prominent in the basal half; 2 nd tergite wider apically than basally, 3 rd tergite with equal basal and apical width and the 5 th tergite is wider than long; all the posterior tergites (6–8) are overlapping can be counted by their posterior truncate margins; ovipositor 2.6 mm, longer than the combined length of metasoma and propodeum; Ovipositor with an terminal notch, ovipositor sheath uniformly setose, longer than metasoma, 0.68 × fore wing length; hypopygium truncate medially ( Fig. 2L ).

Variation: the length of ovipositor sheath varies greatly i.e. 0.6–0.9 × fore wing length; fore wing 0.6–0.88 × body length in females; the first metasomal tergite 1.78–2.7 × as long its maximum width. The colour of the dorsal head, mesoscutum and scutellum varies from brownish in most of the specimens to completely blackish brown in some specimens and yellow medially and dark brown laterally in others, mesoscutum and scutellum show similar colour variation but may differ in some specimens; Mesopleuron yellow to dark brown; propodeum yellowish to brown, propodeal carinae prominent in some specimens and weakly indicated in some other specimens; metasomal tergites brown anteriorly, yellow posteriorly, uniformly yellow in some specimens; first metasomal tergites varies from yellow, brown to dark brown.

Material Examined: 19♀♀, 7♂♂; INDIA: Assam , 1♀, Guwahati, Chandubi (25.8828° N 91.4257° E), 19.iii.2019, coll. A. Rameshkumar, Sweep net; 1♀, Rain Forest Research Institute ( RFRI), Jorhat (26.78130 N, 94.29203 E), 8.iii.2019 ; 2♀♀, Majuli (26.98101 N 94.15373 E), 14.iii.2019 ; 2♀♀, Assam Agricultural University, Jorhat (26.72783 N 94.20270 E), 12.iii.2019 ; 1♀, Bon-gaon, Trunk Rd (26.97008 N 94.58044 E), 10.vii.2019 (yellow pan trap); coll. Rameshkumar, A. Manipur; 1♀, Manipur University , life science block (24.752350, 93.928031), 9.xi.2021, coll. Nazrius,A. Maharashtra, 2♂♂, Thane West, Chena Bridge (19º16.283ʹN, 72º55.031ʹE), 15.xii.2020, coll. Rameshkumar & party. Nagaland; 7♀♀, TB Hospital, Khuzama, Kohima (25.5899316N, 94.140318E), 6.xi.2021, coll. Anand, N. Odisha; 2♂♂, Jagannathapatna (19º30.807ʹN, 85º04.929ʹE), 01.xii.2020 ; 2♀♀, 1♂, Samkona (21º27.276ʹN, 86º52.017ʹE), 29.xi.2020 ; 1♀, 3♂♂, Badatrilochanpur (20º50.175ʹN, 86º12.044ʹE), 30.xi.2020 coll. Rameshkumar & party. West Bengal 1♀, Sagar Island (21.731562N, 88.122336E), 9.iii.2020, Coll. Ghosh, D.J. , by weep net.

All specimens examined deposited in National Zoological Collection ( NZC), Zoological Survey of India, New Alipore, Kolkata.

Distribution: INDIA; Assam, Manipur, Maharashtra, Nagaland, Odisha and West Bengal.

Figures

FIGURE 2. Orgilonia ashmeadi; Head: A. dorsal, B. frontal, C. lateral; D. Antenna; Mesosoma: E. lateral, F. dorsal; G. wings; Metasoma: H. dorsal, I. lateral; J. ovipositor sheath; K. first metasomal tergite; L. terminal ovipositor; M. hind tarsus.