70 BRITISH ICHNEUMONS. 



<J. Head black ; palpi, mandibles, labrum, clypeus, cheeks, face, 

 frontal and external orbits flavous or white. Antennae beneath vary from 

 fuscous to red, always with the scape white ; central band absent. Thorax 

 black, a little elevated in front ; normal marks near radix, two pectoral 

 viltae, sometimes the margin of the pronotum and a line or two dots below 

 the scutellum, whitish. Scutellum entirely or only at the apex white. 

 Abdomen black, with the incisures often more or less stramineous ; sculp- 

 ture of the first and second segments as in 9 . Legs whitish stramineous ; 

 anterior coxae and trochanters always white ; posterior femora somewhat 

 stout, fulvous, apically black, tibiae white with black apex, tarsi black with 

 the base of the joints generally white. Length, 4-7 mm. 



Both sexes may be known by their nitidulous surface and the extent of 

 the white markings, the ? by the peculiar structure of the hind coxae and 

 the punctured base of the second segment, and the 6 by its transverse 

 thyridii, which are broader than the intervening space. 



This species occasionally varies slightly in colour : the 3 sometimes has 

 the hind coxae and femora nearly entirely black, and the $ has the apex of 

 the scutellum red, instead of yellowish or white, and this variety constituted 

 Gravenhorst's /. decimator ; or the markings paler, with the apical margins 

 of the segments stramineous. 



Mr. Bignell has taken this species, which Stephens did not know as 

 British, at Plym Bridge, on September 24th ; it is recorded from Essex ; 

 and I have once found it in the Bentley Woods, in the middle of June. 

 It ranges throughout the whole of Europe, where it has been found at 

 the beginning of July, among undergrowth. It does not appear to have 

 been bred. 



18. magus, Wesm. 



Ichneiinion magus, Wesm. Bui. Ac. Brux. 1855, p. 3S9 ; Holmgr. Ichn. Suec. i. 148 ; 

 cf. Biidg. Trans. Ent. Soc. 1886, p. 336; Berth. Ann. Soc. Fr. 1895, P- 270, 6 ?. 

 Cratichiieumon magus, Thorns. O. E. xviii. 1954, i ? . 



$ . Head black ; mandibles and apex of clypeus red ; cheeks and 

 temples inflated, sparsely punctate. Antennae stout, filiform ; ferrugineous 

 beneath throughout, excepting the central white band ; fifth joint quadrate. 

 Thorax black ; metathorax punctate-scabriculous, with complete upper 

 areae ; areola sub-transverse and apically emarginate. Apex of scutellum 

 and post-scutellum red. Abdomen piceous ; post-petiole at the apex red 

 and smooth, very finely punctate centrally before the apex ; second and 

 third segments with the incisures rufescent, the former with obsolete 

 gastrocaeli ; terebra only just exserted beyond the apex of the seventh 

 segment. Anterior legs stout, red, with base of coxae piceous ; the hind 

 ones stout, dark piceous, tarsi and tibiae red, the latter darker apically ; 

 hind coxae with three elevated oblique lines (cristulae) beneath. Wings a 

 little clouded ; stigma and tegulae ferrugineous ; areolet narrowed above. 



$ . Head black ; palpi, mandibles, clypeus, inner orbits and various 

 central markings of the face, flavous. Antennae apically ferrugineous, with 

 flavous mark on the scape beneath. Thorax black, somewhat convex in 

 front ; the sculpture of the metathorax as in the ? . Abdomen black, the 

 thyridii and apical margin of second and third segments being rufescent ; 

 the sculpture of the post-petiole is like that of the $ , the second with 

 obsolete gastrocaeli, and the thyridii distinct. Anterior legs red with 



