Poecilostictus RATZEBURG

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 : 1496-1497

21. Poecilostictus RATZEBURG

Poecilostictus RATZEBURG 1852 - Die Ichneumoniden der Forstinsekten 3: 174.

Type species: Poecilostictus octopunctatus RATZEBURG (= Hoplismenus cothurnatus GRAVENHORST )

Neoplatylabus HEINRICH 1935 - Dt. Entom. Zeitschr.: 196-198.

Type species: Hoplismenus cothurnatus GRAVENHORST.

Poecilostictus: PERKINS 1959 - Royal. Ent. Soc. London 7: 56.

Poecilostictus: HEINRICH 1974 - Ann. Zool. Wars. 32 (8): 187-189.

D i s t r i b u t i o n: Palaearctic and Oriental Regions (highland).

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

This genus differs by morphology from all other genera of the tribe first of all by flat, almost arcuate rounded from the front matt clypeus and secondly by narrow and very long, slightly flattened at base petiolus. It differs moreover by only slightly marked, almost not developed gastrocoeli and thyridia and by shortened propodeum with sharply transversal area superomedia, more than twice, sometimes four times wider than length. Flagellum of males is with distinct tyloides.

M o r p h o l o g y:

F l a g e l l u m: Of females long, slender, scarcely widened and flattened ventrally beyond middle, strongly attenuated toward apex, with white annulus. Flagellum longer than the front wing and body length. Flagellum of males not flattened ventrally beyond middle, with pronounced long and narrow tyloides.

H e a d: Head contour from front slightly narrowed downwards, genae convex; temples behind eyes from above only just narrowed backwards, long. Occipital carina sharp, not high, meeting with hypostomal carina on mandible base; mandibles strong, slightly evenly narrowed behind base, teeth almost in a same plane; clypeus almost flat, matt, in front almost smoothly arcuate rounded, sharply separated from face; middle field of face sharply limited, elevated above lateral fields, narrow; antennal cavities deep, but short with distinct tooth between antennal fossae; ocellar triangle only just expressed. Face and clypeus densely and finely punctured with developed microsculpture.

T h o r a x: Transverse furrow of pronotum not interrupted by keel; pronotal ridge not thickened; epomiae sharp; pronotal base gradually and uniformly curved. Mesonotum strongly convex, only just longer than width, notauli marked only at base; axillary tongue developed, but weak; surface of mesonotum densely punctured, matt; subalarum very high, slightly bent upwards, forming deep cavity between subalarum and subalar tubercle; sternauli only just marked only at base, not sculptured; scutellum strongly elevated, carinated laterally up to apex, horizontal part convex, declivous surface almost matt. Hind margin of metanotum with very thin projections. Propodeum short, transverse; horizontal part two times shorter than length of area posteromedia; all carinae of propodeum distinct, area basalis sharply abrupt, deep; area superomedia sharply transversal; areae dentiparae without teeth; coxal carina expressed, but slight; spiracles large, elongated, two times longer than width. Surface of propodeum densely wrinkly-punctured.

L e g s: Strong, rather long. Segments of front and middle tarsi with flattened area ventrally (as of Abzaria CAMERON Neolevansa GAULD and Neeurylabia HEINRICH ).

W i n g s: Areolet quadrangular, rarely almost pentagonal with very narrow base; radius almost straight; nervulus interstitial. Length of front wing some shorter than body length.

A b d o m e n:Fromabove of females rather short, oval, almost parallel sided; second tergite longer than width at apex; tergite 7 cut out along hind border, ovipositor slightly protrude behind apex of abdomen. Petiolus of first tergite very long, slightly flattened at base, from lateral very gradually transform to postpetiolus; lateral carinae of petiolus sharp; middle field of postpetiolus distinct, high elevated, not carinated with delicate coriaceous sculpture. Gastrocoeli slightly impressed, long, thyridia slightly expressed; lunulae distinct; interval irregularly wrinkled, second tergite in middle coriaceous, with developed microsculpture; third tergite very delicate punctured. Hypopygium from lateral compressed, without fold.

C o l o r a t i o n: Main color black, of Palaearctic species with slight, at Oriental species with extremely reach yellow-white pattern, tarsi of hind legs of both species yellowwhite; main color of femora and tibiae black or red.

S i z e: 9-12 mm.