Rhogadopsis longivena Chen & van Achterberg, 2016

Chen, Meng, van Achterberg, Cornelis, Tan, Jiang-Li, Tan, Qing-qing & Chen, Xue-Xin, 2016, Four new species of Rhogadopsis Brethes from NW China (Hymenoptera, Braconidae, Opiinae), Journal of Hymenoptera Research 52, pp. 37-60 : 43-46

Rhogadopsis longivena Chen & van Achterberg sp. n.

Figs 23 , 24-32

Type material.

Holotype, ♂ (NWUX), "NW China: Shaanxi, Liping Nat. For. P., MT1+2, c. 1495 m, 22.vi.4.ix.2015, 32°47'33"N, 106°39'52"E, JL. Tan & C. v. Achterberg".

Diagnosis.

The combination of an absence of the medio-posterior depression of the mesoscutum (Fig. 26 ), the first metasomal tergite without a long median carina (Fig. 27 ) and vein r of the fore wing long and slender (at least 5 times longer than wide; Fig. 23 ) makes this species easy to separate from other known species.

Description.

Holotype, ♂, length of body 4.4 mm, and of fore wing 4.2 mm.

Head. Antenna incomplete, 34 segments remaining, third segment 1.3 times as long as fourth segment, length of third, fourth and penultimate segments 2.0, 1.9 and 1.8 times their width, respectively (Figs 28-29 ); maxillary palp 1.3 times as long as height of head; labial palp segments slender; occipital carina rather far separated from hypostomal carina and carina dorsally absent; hypostomal carina narrow; length of eye in dorsal view 3.1 times temple; frons shallowly depressed, smooth and setose, laterally punctate and setose; face setose, with weak medial elevation, medially remotely and laterally densely punctate (Fig. 30 ); width of clypeus 2.1 times its maximum height and 0.5 times width of face, clypeus moderately convex, straight and thin ventrally (Fig. 30 ); hypoclypeal depression medium-sized (Fig. 30 ); malar suture present; length of malar space 1.1 times basal width of mandible; mandible triangular and with long carina.

Mesosoma. Length of mesosoma 1.4 times its height; dorsal pronope absent; pronotal side glabrous, mainly smooth and only medio-anteriorly and posteriorly crenulate; epicnemial area smooth; precoxal sulcus medium-sized and crenulate, remain removed from anterior and posterior margins of mesopleuron; remainder of mesopleuron smooth; pleural sulcus smooth; anterior groove of metapleuron crenulate; notauli absent on disc; mesoscutum largely glabrous, but setose along notauli courses; media-posterior depression of mesoscutum absent; scutellar sulcus rather narrow and crenulate; scutellum slightly convex medially; smooth and setose; propodeum with nearly complete medio-longitudinal carina and partly smooth anteriorly, sparsely rugose medially and with some crenulae posteriorly (Fig. 26 ).

Wings. Fore wing (Fig. 24 ): pterostigma triangular; 1-R1 ending at wing apex and 1.5 times as long as pterostigma; r:3-SR:SR1 = 10:31:52; 2-SR:3-SR:r-m = 20:31:14; r slender and about 5 times longer than wide (Figs 23 - 24 ); 1-M and SR1 slightly curved; m-cu antefurcal; cu-a oblique and far postfurcal; first subdiscal cell closed and CU1b short; apical 0.2 of M+CU1 sclerotized. Hind wing (Fig. 24 ): M+CU:1-M: 1r-m = 14:19:12; cu-a straight; m-cu completely absent.

Legs. Length of femur, tibia and basitarsus of hind leg 4.1, 7.8 and 5.2 times as long as wide, respectively; hind femur and tibia with long setae.

Metasoma. Length of first tergite 1.5 times its apical width, its surface moderately convex medially, some grooves and minute punctures, dorsal carinae united and with long median carina; second tergite smooth, with pair of rather large basal depressions; following tergites smooth.

Colour. Black, legs, clypeus and mandible brownish yellow (but teeth black); palpi, coxae, trochanters and trochantelli ivory; hind tarsus and apical half of tibia dark brown; malar space ivory; wing membrane subhyaline; metasoma largely (except T1) and pterostigma dark brown.

Distribution.

China (Shaanxi).

Biology.

Unknown.

Etymology.

From “longus” (Latin for “long”) and “vena” (Latin for “vein”) because of the long vein r of the fore wing.

Figures

Figures 23. Rhogadopsis longivena sp. n., female, holotype.

Figures 24 - 32. Rhogadopsis longivena sp. n., female, holotype. 24 wings 25 mesosoma lateral 26 mesosoma dorsal 27 first-fourth metasomal tergites dorsal 28 base of antenna 29 antenna 30 head anterior 31 head dorsal 32 hind leg.