Platylabus flagellator, Riedel, 2011

Riedel, M., 2011, Contribution to the Ichneumoninae (Hymenoptera, Ichneumonidae) of Southeastern Asia: 1. Tribes Clypeodromini, Listrodromini, Goedartini, Compsophorini, and Platylabini, Linzer biologische Beiträge 43 (2), pp. 1549-1572 : 1565

Platylabus flagellator nov.sp.

H o l o t y p u s (): N. Vietnam: Vinh Phuc Tan Dao N.P., c. 1000 m, 15.iv.2001, R. de Vries RMNH´01" (Leiden).

D e s c r i p t i o n:

Body length 9 mm. Flagellum long and slender, bristle-shaped, with 34 flagellomeres, all flagellomeres much longer than wide, first flagellomere (without anellus) about 5.2 times as long as wide. Temples strongly narrowd behind the eyes. Ocelli large, the lateral ones about 1.3 times as long as their distance to the eyes, frons with fine puncture medially, its sides almost smooth, face with longitudinal puncture-striation, matte, clypeus with dense puncture and almost shining. Malar space 0.5 times as long as the width of the mandibular base.

Mesoscutum, mesopleura including the speculum and metapleura densely and finely punctured, more or less shining, coxal carina only distinct in its apical third. Scutellum distinctly elevated, about as long as wide, with strong lateral carinae, confluent as a transverse keel in the center. Propodeum punctured, without apophyses, its spiracles long-oval (index about 2.5). Area superomedia horseshoe-shaped, a little wider than long, costulae lacking,area posteromedia with transverse wrinkles. Coxae with dense puncture, hind coxa without scopa. Hind femur about 4 times as long as high, with superficial dense puncture.

Metasoma amblypygous, postpetiole moderately widened, with indistinct dorsal carinae, median field with fine puncture-striation. Second tergite 0.95 times as long as wide, gastrocoeli slightly impressed, thyridia large, oblique, each about 1.8 times as wide as their interval, second and third tergites densely and finely rugulo-punctured, matte, following tergites granulated and more or less shining.

Colour black. Ivory are stripes or rings on flagellomeres 6-13, mandibles, palps, facial and frontal orbits up to vertex, sides of clypeus, stripe on outer orbits, anterior and upper margin of pronotum, subalar ridge, two longitudinal stripes of mesoscutum, a vertical stripe anterior to prepectal carina, upper hind edge and large spot of mesopleura beneath the speculum, scutellum and postscutellum, hind third of propodeum (except area posteromedia), hind margin of postpetiole, front and middle coxae and trochanters and dorsoanterior spot of hind coxa. Red are hind coxa, legs, frontal sides of propodeum, tergites 1-3 and apical bands on tergites 4-5. Hind femora dark reddish-brown, hind tibiae in the apical half and apical segments of all tarsi black. Pterostigma black.

unknown.

T a x o n o m i c a l r e m a r k This new taxon is the only one from the Oriental region with mainly black mesosoma and more or less reddish metasoma as found in some Palaearctic species. It resembles the Palaearctic Platylabus rufus WESMAEL , but differs by its slender flagellum and the extensive ivory marks of head and mesosoma.