BRITISH ICHNEUMONS. 35 



15. liocnemis, Thorns. 



Ichneumon riijiniis, Holmgr. Ichn. Suec. i. 28, (? ?, excl var. (iiec Grav.). Coelich- 

 neiititon liooieiitis. Thorns. O. E. xviii. 1909, c? ? . /. liocnemis. Berth. Ann. Soc. Fr. 

 1894, p. 543. i ? • 



A very stout, sub-depressed, black species, with abdomen and legs red. 

 Head somewhat buccate, black ; cheeks and temples rather broad and 

 sparsely punctate ; clypeus slightly bisinuate apically ; $ with j^alpi and 

 mandibles red ; frontal and vertical orbits flavidous ; $ also with palpi, 

 mandibles, sides of clypeus and of face, flavidous. Antennae sub-filiform 

 and very little dilated centrally ; first flagellar joint hardly twice longer 

 than broad, the following quadrate ; of $ joints eight to twelve white. 

 Thorax dorsally deplanate, black ; callosity below radix, in $ another before 

 it and the pronotum, flavidous ; metathorax indistinctly punctate, the areola 

 apically incomplete or emarginate ; the petiolar area distinctly concave. 

 Scutellum flat, with its basal carinae and lateral margins flavidous ; of $ 

 sometimes entirely black. Abdomen dorsally deplanate, of c? sub-equilateral, 

 of $ elongate-ovate ; all the segments distinctly transverse, castaneous-red ; 

 first segment, and, in $ , part of second and third, fuscous ; post-petiole very 

 broad, aciculate, its apex sparsely but somewhat coarsely punctate, rectan- 

 gular ; gastrocaeli broad and deep, the intervening space striolate-rugose. 

 Legs stout, red ; of $ partly black : coxae, hind tarsi and apices of their 

 tibiae black \ hind coxae nearly smooth, with large, fuscous scopulae. Wings 

 sub-hyaline ; stigma and tegulae piceous, latter partly pale in $ . Length, 

 10 mm. 



In the females below referred to, the antennae are strikingly short, being 

 only 6 mm. in length ; the metanotal areae are complete ; the spiracles 

 oblique ; areola sub-quadrate ; the basal area distinct ; the mesopleurae 

 strongly shining and obsoletely punctate ; the gastrocaeli are distinctly trans- 

 verse, the intervening space being as broad as the centre of post-petiole ; 

 segments two to four are finely aciculate on the disc, with the incisures deep ; 

 the hind femora are impunclate below and the areolet wide above. They 

 differ from the above description only in having the radical callosities and 

 base of scutellum immaculate; this last bears two indistinct apical dots, 

 resembling those of C. microsticius, var. serenus. Length, 12 mm. 



Holmgren says this species differs from C. lineator in its shorter antennae, 

 the often incomplete areola, shorter basal segment, broader post-petiole, 

 and second segment, and in having the femora and tibiae evidently stouter. 



It differs from C. fuicrostictus in the more finely punctured frons, red 

 femora and tibiae, much larger and denser scopulae, the sub-filiform an- 

 tennae having only a five-jointed band ; in the female's stouter legs and 

 quadrate second flagellar joint, and in the male's more finely i)unctate and 

 broader post-petiole. 



Marshall considers /. rufinus of Holmgren to be synonymous with that 

 of Grav., which is not the case, since the latter belongs to the genus Stcn- 

 ichneumon, with which, indeed, the present species is very closely allied, on 

 account of its indistinct thoracic sulcus and transverse gastrocaeli, which 

 latter, however, are very deeply impressed, and the distinct basal area 

 and general contour relate it more closely with the present grou]) in which 

 Thomson has placed it. It is probably to the present species that Marshall 

 refers, and as I have met with no indigenous example of .S'. rufinus^ drav., 

 that species is but tentatively retained in our list. 



