Levansa TOWNES, 1961

A. M, 2009, Illustrated key to the tribes of subfamilia Ichneumoninae and genera of the tribe Platylabini of world fauna (Hymenoptera, Ichneumonidae), Linzer biologische Beiträge 41 (2), pp. 1317-1608 : 1469

11. Levansa TOWNES

Levansa TOWNES 1961 - Cat. Reclass. Indo-Austr. Ichn.: 474.

Type species: Ichneumon decoratorius FABRICIUS.

D i s t r i b u t i o n: New Zealand. Tasmania.

I n t r o d u c t i o n:

The genus is relative and similar in outward appearance with Linycus CAMERON and differs from it as follows: longer temples, scutellum without lateral carinae or with carinae developed only at base, carinae of propodeum, presented by apical transverse carina and often parts of lateral longitudinal carina and part of median longitudinal carina (other carinae are absent or only just expressed). Longitudinal carinae of first tergite are not distinct or partially absent. Postpetiolus is slightly wider and shorter than at Linycus . Gastrocoeli are presented by shallow, slightly sloped impression, thyridia practically not expressed same as at Linycus .

M o r p h o l o g y:

F l a g e l l u m: Without white annulus, all segments elongated. Of males without tyloides.

H e a d: Head contour from front with big eyes, narrowed downwards, temples behind eyes from above narrowed, almost straight; occipital carina meeting with hypostomal carina far from mandible base; abscissula equal by length to mandible base width; hypostomal carina visible from lateral to a long distance; mandibles with form character to Platylabini ; clypeus with straight front margin and slightly rounded corners; ocellar triangle distinctly elevated.

T h o r a x: Transverse furrow of pronotum not interrupted by keel; pronotal ridge not thickened at most sharp form and pronotum impressed laterally practically reaching border with mesonotum; epomiae practically absent; pronotal base gradually sharply curved. Mesonotum strongly convex, almost equal of length and breadth, notauli broad, developed up to middle of mesonotum; sternauli in form of slight impressions, distinct up to middle; scutellum strongly convex, from above triangle, laterally carinated just only at base (not carinated). Metanotum without projections. Propodeum only with developed apical transverse carina, area superomedia, if developed, transversal; lateral carinae of area superomedia weak; spiracles of propodeum oval to circular.

L e g s: Legs slender; claws thin, smooth, at apex rather strongly curved.

W i n g s: Areolet quadrangular with blunted base; nervellus of hind wing broken at top.

A b d o m e n Petiolus wider than height at base, from lateral sharply, but gradually transform to postpetiolus; dorsomedian carinae of first tergite not expressed. Gastrocoeli presented by shallow, slightly oblique impression; thyridia practically not expressed, interval between gastrocoeli at base equal by breadth to middle field of postpetiolus. Hypopygium long, reach to apex of abdomen and completely overlap sheath of ovipositor, from below triangle, flat, slightly compressed from sides only at apex.

S i z e: Small species.