Ambloplisus ornatus (CRESSON)

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 : 1486-1488

Ambloplisus ornatus (CRESSON) (Plate 41)

Hoplismenus ornatus CRESSON 1868 - Amer. Ent. Soc. Trans. 2: 92, ♀.

Ambloplisus ornatus HEINRICH 1959 - Ent. News 70: 216, ♀.

Ambloplisus ornatus: HEINRICH 1962 - Canad. Ent. 27: 790-791, ♀, Ƌ.

Ambloplisus ornatus: HEINRICH 1977 - Arthropods of Florida and Neighbor. Land Areas 9: 277- 278, ♀, Ƌ.

F e m a l e

F l a g e l l u m: Bristle-shaped, moderately stout, with 36 segments, scarcely widened beyond middle, slightly flattened ventrally, gradually attenuated toward apex, segment 11 square, with white semiannulus on segments (5)6-11(12); basal segments moderately long, first segment 4,3 times longer than width at apex. Flagellum 1,2 times longer than the front wing and 1,2 times shorter than body length.

H e a d: Head contour from front strongly almost straightly narrowed downwards, transversal, 1,6 wider than height, with long genae almost straightly narrowed downwards and equal almost third of eye height; head contour from above transversal, 2,3 times wider than length. Vertex from lateral slanting almost straightly just after the level of eyes and ocelli; temples (from above) strongly, almost straightly, narrowed behind eyes, from side parallel to hind margin of eye, equal in middle to 0,6 of longitudinal diameter of eye; occipital carina from above slightly almost angularly impressed behind ocelli, far not reach level of eyes and hind ocelli, meeting with hypostomal carina not reaching mandible base; genae long, malar space almost 1,5 times longer than the mandible base width; mandibles very strongly narrowed behind base (with form character to Platylabini ); clypeus strongly convex, transversal, almost 2 times wider than length, with straight front margin and rounded lateral corners, sharply separated from middle field of face; clypeal foveae large and deep; labrum protrude from under clypeus, long, rounded, equal by breadth to clypeus front margin; middle field of face distinct, parallel sided, wider than lateral fields, but slightly elevated above them; antennal cavities deep with rounded tubercles laterally and without tooth between antennal fossae, theirs margins almost reach eyes, but not reach front ocellus level; ocelli large, diameter of lateral ocellus equal to distance from ocellus to eye, ocellar triangle distinctly elevated. Head surface shining, clypeus and middle field of face with superficial punctures, frons absolutely smooth.

T h o r a x: Collar of pronotum moderately long, transverse furrow shallow. Mesonotum moderately convex, longer than width, notauli marked only at base; surface densely punctured, without microsculpture, shining between punctures; subalarum moderately thick not sharpened; speculum smooth, shining, not punctured, mesopleural fovea moderately deep, with slightly impressed surrounding area; sternauli slightly marked only at base; mesopleurae longitudinally wrinkly-punctured shining; scutellum slightly elevated above postscutellum, laterally carinated up to apex, its surface with sparse shallow punctures, polished. Hind margin of metanotum with triangle projections opposite lateral longitudinal carinae. Propodeum from lateral of broken type, horizontal part of propodeum in middle approximately equal to length of area posteromedia; basal furrow deep; area superomedia not separated from area basalis by carina (area superomedia and area basalis merged), longer than width, approximately parallel sided; costulae and coxal carina absent; area dentipara with strong apophysis; spiracles rather large, longish-oval (equal 0,5 breadth of area spiraculifera at place of spiracle), 1,3-1,4 times longer than width. Surface of propodeum wrinkled without microsculpture, metapleurae shining, superficially punctured.

L e g s: Long, moderately slender. Claws curved almost at right angle.

W i n g s: Areolet quadrangular asymmetrical, intercubital veins equal by length, but external vein of apex longer than internal; stigma narrow, light; radius slightly sinuous, long; radial cell long; nervulus interstitial or very slightly postfurcal; ramulus slightly developed; wings hyaline, veins light. Front wing 1,2-1,3 shorter than body length.

A b d o m e n: From above broad, drop-shaped, flattened dorso-ventrally; second tergite longer than width at apex. Petiolus only just wider than height at base, from lateral with gradual passage to postpetiolus and distinct lateral carinae, from above gradually broadened to postpetiolus; distance between spiracles more than distance from them to apex; postpetiolus with only just marked middle field considerably more wider (2 times) than lateral fields and with very slight rugosity, smooth, without microsculpture. Gastrocoeli moderately, deep, rather short with distinct slightly oblique thyridia, interval considerably wider than thyridia, its surface with big deep punctures; lunulae slightly marked, but distinct, moderately large; second tergite with sparse superficial punctures, delicate coriaceous, semimatt, other tergites with similar sculpture. Hypopygium broad flat, broadly pointed, reach apex of abdomen; sheath of ovipositor hidden, not protrude behind apex.

C o l o r a t i o n: Head, thorax, coxae and trochanters with very reach light-yellow pattern. Abdomen, femora, tibiae and tarsi, with exception of hind, dark- or light-red, abdomen with slight white spots at corners of 1-4 tergites.

S i z e: Body length: 8,8; front wing: 7,0; flagellum: 7,3 mm.

M a l e (according to HEINRICH)

Flagellum with 34-35 segments, without tyloides, with white annulus on segments (9)10- 16; area posteromedia of males slightly shorter than horizontal part of propodeum; hypopygium of males elongated and bipartite. Unusually sharp sexual dimorphism in coloration: black with very reach white coloration on head and thorax and with white apical bands on all tergites of abdomen.