Platylabus rufus WESMAEL

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 : 1509-1511

Platylabus rufus WESMAEL (Plate 49)

Platylabus rufus WESMAEL 1844 - Mém. Acad. Roy. Sci. Let. Beaux-Arts Belgique 18: 154, ♀. F e m a l e

F l a g e l l u m: Bristle-shaped, very long and slender, with 35 segments and white annulus on segments (7)-12, sharply pointed toward apex, not widened or moderately widened beyond middle, beyond white annulus scarcely flattened ventrally; basal segments moderately elongated, first segment 3,3 times longer than width at apex laterally. Flagellum by length approximately equal to front wing and body length.

H e a d: Head contour from front roundly narrowed downwards, 1,4 times wider than height; genae length from front four times shorter height of eye; head contour from above transversal, 1,8 times wider than length. Vertex gradually oblique to low and sharply expressed occipital carina; temples behind eyes from above roundly narrowed behind eyes, moderately long, in middle 1,3 times shorter than longitudinal diameter of eye, from side parallel to hind margin of eye; occipital carina from above gradually concave, not reach level of eyes and far not reach hind ocelli; occipital carina meeting with hypostomal carina before mandible base; mandibles gradually narrowed from base to apex, lower tooth slightly move inside; clypeus transversal, 2,2 times wider than length; convex, with straight thinned front margin and distinct rounded corners, separated from face by shallow impression; clypeal foveae deep, of moderate size; labrum protrude from under clypeus, equal by breadth to front margin of clypeus, rounded, moderately long; middle field of face expressed, slightly elevated, 1,2 times narrower than lateral fields in middle; antennal cavities distinct, reach borders of eyes but far not reach front ocellus level, with lateral tubercles and tubercle between antennal fossae; ocelli of normal size, diameter of lateral ocellus equal to distance from ocellus to eye, ocellar triangle distinctly elevated. Surface of head and clypeus with exception of apex densely punctured by superficial punctures, of frons and vertex slightly shagreen, of temples with superficial punctures, shining.

T h o r a x: Collar of pronotum short, with straight front margin, transverse furrow deep, narrow; epomiae weak. Mesonotum moderately convex, of equal length and breadth; notauli weak, marked in front third; surface of mesonotum with dense superficial punctures, without microsculpture; subalarum normal, high, but not sharpened; speculum punctured by big smoothed punctures; area of mesopleural fovea moderately impressed; sternauli slightly impressed up to middle of mesopleurae; mesopleurae without sharp bend at lower part; surface of mesopleurae wrinkly-punctured, without microsculpture, shining; scutellum moderately elevated, laterally carinated up to postscutellum, its horizontal part slightly convex with sparse smoothed punctures, without microsculpture. Hind margin of metanotum with sharp triangular projections opposite lateral longitudinal carinae. Propodeum from lateral gradually slanted to hind coxae; horizontal part two times shorter than length of area posteromedia in middle; fields of propodeum distinct, all carinae, with exception of costulae, developed, coxal carina very slight; area basalis deep; area superomedia quadrangular, transversal, some narrowed in front and high elevated above lateral fields; area dentipara at apex without denticle; spiracles of moderate size, equal 0,4 breadth of field at place of spiracle, elongated, two times longer than width. Surface of propodeum slightly wrinkled, without microsculpture; metapleurae densely punctured by smoothed punctures.

L e g s: Slender. Claws thin, at apex sharply curved almost at right angle.

W i n g s: Areolet quadrangular, almost symmetrical (external vein of base some longer than internal); stigma long, dark; radius slightly curved, almost straight, long, bent only at apex; radial cell rather long and broad; nervulus interstitial; ramulus expressed; veins dark, membrane of wing hyaline. Length of front wing equal to body length.

A b d o m e n: Abdomen from above broadly-oval compressed dorso-ventrally; second tergite transversal, 1,2 times wider than length; apical tergites not hidden, ovipositor from above distinctly protrude. Petiolus of first tergite distinctly flattened at base; first tergite from lateral with gradual passage to postpetiolus; lateral carinae of petiolus sharp, interspace between them with transversal wrinkles; from above petiolus rather gradually, but distinctly broadened to postpetiolus; middle field of postpetiolus slightly elevated, not carinated, wider than lateral fields; surface of postpetiolus irregularly-wrinkled slightly shining. Gastrocoeli transverse, oblique, shallow; thyridia distinct, large, near base of second tergite, 2,5 times wider than interval between them, laterally reach to borders of tergite; lunulae very weak, but distinct; surface of second and third tergites coriaceous, slightly shining, other tergites smooth, shining. Hypopygium from lateral strongly elongated and pointed, with slight fold in middle.

C o l o r a t i o n: Body mainly ferruginous-red, only vertex, horizontal part of propodeum and first tergite darkened. Internal orbits, spots on vertex, stripes on external orbits, hind corners of pronotum and subalarum yellow.

S i z e: Body length: 7,3; front wing: 7,4; flagellum: 7,4 mm.