Achaiusoides, A.M, 2011

A. M, 2011, Illustrated key to the genera of the subtribe Amblytelina of Palaearctic (Hymenoptera, Ichneumonidae, Ichneumoninae, Ichneumonini), Linzer biologische Beiträge 43 (1), pp. 597-711 : 640-641

5. Achaiusoides nov.gen.

Type species: Achaiusoides epistomalis nov.sp.

D i s t r i b u t i o n: Russia,FarEast,Primorije.

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

The genus is characterized by sharply limited and elevated quadrangular middle field of face, sharply separated from distinctly convex clypeus and by hypertrophied triangular second segment of maxillary palps. Distinct in a front third of mesonotum notauli, propodeum with strongly developed wrinkling or cellular sculpture, slightly elevated area of area superomedia of horizontal part of propodeum, indistinct carinae and broad teeth-like formations at apices of areae dentiparae are characteristic to the genus. Abdomen is amblypygous, long and almost parallel-sided from above. Tergite seventh is far protrude from under sixth, almost to its length, like Achaius CAMERON and in profile it is bent downwards, like Limerodops HEINRICH. Smooth middle field of postpetiolus, long, slightly impressed superficial gastrocoeli with sharply expressed and slightly oblique thyridia are characteristic to the genus.

M o r p h o l o g y:

F l a g e l l u m: Moderately thick, bristle-shaped with slightly elongated segments and white annulus; distinctly shorter than the front wing.

H e a d: Head contour from front roundly narrowed downwards; temples from above roundly narrowed behind eyes; second segment of maxillary palps hypertrophied, triangular; mandibles rather short, evenly narrowed from base to apex, with long upper tooth and short, flattened with rounded apex lower one; clypeus distinctly convex with straight front margin; the fields of face sharply differentiated, middle field quadrangular, sharply elevated and separated from lateral fields by impressions and from clypeus by sharp, narrow impression; tooth between antennal fossae strongly developed, wide, triangular. Surface of head with smoothed punctures, shining.

T h o r a x: Mesonotum moderately convex, only just longer than width, notauli distinct at front third, surface of mesonotum densely punctured, medially in front with microsculpture and shining laterally; mesopleurae with smoothed bend; sternauli absent; scutellum laterally not carinated, distinctly elevated above postscutellum. Hind margin of metanotum with projections. Propodeum distinctly separated on horizontal and vertical surface; horizontal part of propodeum almost two times shorter than area superomedia in middle; basal area short, convex; carinae with exception of costulae developed, but at horizontal part of propodeum indistinct, because of general cellular-wrinkled sculpture; area superomedia transverse, indistinctly hexagonal; propodeum at apices of areae dentiparae extended to broad teeth-like projections; spiracles big, wide, 2 times longer than width.

L e g s: Stout. Hind coxae of females without scopa.

W i n g s: Areolet big, pentagonal; nervulus postfurcal; radius curved at base.

A b d o m e n:Fromabove long, almost parallel-sided, in females amblypygous, tergite seventh far protrude from under sixth almost on its length, in profile bent downwards; tergites 4-6 bent onto ventral surface (as in Limerodops ). Middle field of postpetiolus elevated, convex, but not carinated, smooth with indistinct rugosity and sparse smoothed punctures. Gastrocoeli slightly impressed with wrinkled sculpture, long, with sharp thyridia, narrower than interval between them; interspace between thyridia irregularly wrinkled; surface of second tergite on the larger part distinctly punctured by small punctures. Sternites 2-3 with fold; hypopygium with rounded apex and with long uniform pubescence.

C o l o r a t i o n: Body black with characteristic white pattern: internal orbits, spots on vertex, pronotal ridge, spot on subalarum, scutellum entirely, spots in the corners of postpetiolus; tibiae of all the legs with white rings. By coloration it is resemble to Achaius CAMERON , but without white pattern at apex of abdomen.

S i z e: Body length 16 mm.