Achaiusoides epistomalis, 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 : 641-643

Achaiusoides epistomalis nov.sp. (Plate 5)

H o l o t y p e, Russia, Primorskij kraj, Kajmanovka at Ussurijsk, 29.07.199 2, leg. А. Tereshkin. The holotype is deposited in the collection of Zoologycal Institute of St. Petersburg.

F e m a l e

F l a g e l l u m: Moderately thick, bristle-shaped, with 36 segments, first segment 2 times longer than width at apex, with white annulus on segments 8-12(13), slightly widened and very slightly flattened ventrally behind white annulus; segments elongated slightly, already segment 12 square from lateral. Flagellum 1,5 times shorter than front wing and 2 times shorter than body length.

H e a d: Head contour from front roundly narrowed downwards, only just transverse, only 1,2 times wider than height; genae from front visible only just above of eye’s base (0,2), genae length from front (malar space) 7 times shorter (0,1) than height of an eye; head contour from above transverse, 2,4 times wider than length in middle and 1,9 times along an external contour, slightly and roundly narrowed backwards (at hind fourth) behind eyes. Vertex from lateral roundly sloping from hind border of ocelli to occipital carina; temples in middle approximately equal to longitudinal diameter of an eye; occipital carina sharp all round, from above deeply and roundly impressed, but not reach level of eyes and hind ocelli; hypostomal carina not visible from lateral, occipital carina meeting with hypostomal one some before base of mandible; abscissula very short, 3 times shorter than mandible base width, malar space 2 times shorter than mandible base width; second segment of maxillary palps very strongly enlarged, triangular; mandibles normal, evenly narrowed from base to apex, rather short and wide, with long upper tooth and short with rounded apex and flattened lower one, separated by narrow impression; clypeus distinctly convex, 2,2 times wider than length, with straight almost not thinned front margin and distinct lateral corners, separated from middle field of face by sharp straight suture; clypeal foveae narrow, very deep; labrum distinctly protrude from under clypeus, rounded, equal by breadth to front margin of clypeus; middle field of face sharply elevated above clypeus and lateral fields, quadrangular, in middle 1,3 times wider than lateral fields, separated from them by sharp sutures and impressions; antennal cavities very strongly impressed and merged, not reach borders of eyes and far not reach front ocellus level with polished surface, laterally above antennal fossae without tubercles and with strong broad tubercle between antennal fossae; margins of antennal fossae high elevated above lateral fields of face; frons above antennal cavities under front ocellus strongly impressed; ocelli of normal size, diameter of lateral ocellus approximately equal to distance from ocellus to eye; ocellar triangle slightly elevated. Base of clypeus densely punctured by big punctures, lower half with sparse smoothed punctures, shining, without microsculpture; middle field of face densely punctured and with developed microsculpture, lateral fields with sparse punctures, shining, medially without microsculpture; frons above antennal cavities densely superficially punctured; temples punctured by small smoothed punctures.

T h o r a x: Collar of pronotum from above rather short, wrinkled, with straight front margin; transverse furrow of pronotum deep, narrow; pronotal ridge rather thickened, broad; epomiae slight; pronotal base gradually curved; lateral surface of pronotum at upper half punctured by smoothed punctures, at hind part with smoothed rugosity, shining. Mesonotum moderately convex, only just (1,2 times) longer than width; notauli distinct at front third; surface of mesonotum very densely punctured, particularly middle lobe in front; middle field in front with developed microsculpture, lateral ones shining medially; axillary tongue weak; subalarum thick; speculum shining, punctured; area of mesopleural fovea deeply and very broadly impressed; mesopleural suture straight, very deep, interrupted by smoothed ribs; mesopleurae at bottom with distinct but smoothed bend; sternauli practically absent; most part of mesopleurae densely punctured by smoothed punctures, lower third smoothly wrinkly-punctured, surface of mesopleurae shining; scutellum distinctly elevated above postscutellum, laterally not carinated, its horizontal surface slightly convex with sparse smoothed punctures. Hind margin of metanotum with triangular projections opposite of lateral longitudinal carinae. Propodeum distinctly boxshaped with slightly elevated area superomedia, distinctly divided on horizontal and vertical parts, not shortened, but length of horizontal part of propodeum to hind border of area superomedia 1,8 times less then length of area posteromedia in middle; carinae of propodeum, with exception of costulae, expressed; carinae of horizontal part indistinct because of general cellular-wrinkled sculpture of propodeum, lateral carinae of area dentiparae sinuous, indistinct, costula visible only as a trace; basal area short, convex, wrinkled; area superomedia hexagonal, horseshoe, 2 times wider than length in middle; propodeum at apices of areae dentiparae extended to broad teeth-like projections; spiracles big, wide, along external contour 2 times longer than width. Surface of propodeum with exception of metapleurae, cellular-wrinkled, metapleurae smoothly wrinkly-punctured, shining. By morphology, propodeum some resemble to Pyramidophorus flavoguttatus TISCHBEIN (Platylabini) .

L e g s: Stout; femora, tibiae and tarsi thickened; hind coxae without scopa. Claws small, at apical third sharply curved almost at right angle.

W i n g s: Areolet big, pentagonal, practically symmetrical with wide base; stigma narrow, dark; radial cell narrow, long; radius curved at base; nervulus postfurcal; ramulus long; veins dark; membrane of wing slightly darkened, but hyaline. Front wing longer than flagellum and shorter than body length.

A b d o m e n Amblypygous, from above long, almost parallel-sided; apical tergites not retracted, tergite 7 far protrude under 6, almost on its length, in profile bent downwards; second tergite elongated, width at apex 1,2 times less than length; sheath of ovipositor not protrude from above. First tergite from lateral with distinct gradual bend between petiolus and postpetiolus; dorsal carina practically not expressed, dorsolateral carina smoothed, ventrolateral carina distinct, from lateral petiolus sculptured by slight transversal ribs; from above petiolus gradually broadened to triangle postpetiolus; distance between spiracles many more than distance from spiracles to hind margin of tergite; middle field of postpetiolus distinctly elevated, convex, but not carinated, 3,5 times wider than lateral fields, its surface smooth with indistinct rugosity and sparse smoothed punctures. Gastrocoeli slightly impressed, long with irregularly wrinkled surface; thyridia sharply expressed, slightly oblique, laterally almost reach borders of tergite, 1,3 times narrower than interval between them; lunulae distinct, elongated, situated approximately at middle of tergite; interspace between thyridia irregularly-wrinkled same as a surface of gastrocoeli, surface of second tergite with exception of apico-lateral parts, densely punctured by small punctures, tergite 3 almost up to middle densely punctured by delicate superficial punctures, other tergites with only just visible delicate punctures, smooth, shining. Hypopygium with rounded apex and uniform long pubescence; sternite 2 and 3 with longitudinal fold.

C o l o r a t i o n: Body black with brightly-white pattern: facial and frontal orbits up to hind border of ocelli, spots on vertex, pronotal ridge, spot on subalarum, scutellum entirely, spots in the corners of postpetiolus; tibiae of all legs with white rings, segments of hind tarsi with white base.

S i z e: Body length: 16,0; front wing: 11,6; flagellum: 8,0 mm.

M a l e: Unknown.