74 BRITISH ICHNEUMONS. 



(12). 15. Scutellum not or only laterally white 8. Faunus, Cniv. 

 (3). 16. Al)domen with central segments red. 



(18). 17. Thorax of $ white-marked, of (^ dor- 

 sally rufesccnt 9. ERVTHRAEUS, Gnw. 



(17). 18. Thorax of 9 not white-marked, of ^ 



not rufesccnt 10. sanguinator, Kossi. 



I. leucomelas, GmeL 



Ichuetimon leucomelas, Gmel. S. N. i. 2679 5 t;""- ^- i'-- i- 255 ; Ste. 111. M. vii 158, 

 excl. (J ; Wesni. Noiiv. M6m. Ac. Brux. 1844, p. 87; Holmgr. Ichn. Suec. i. 170; 

 Thorns. Ann. .Soc. Fr. 1888, p. 106 ; Berth, lib. cit., 1895, P- 239, i 9 ■ Melauuh- 

 neuiiion leticonielas, Thonis. O. E. xviii. 1956. /. bilineator, Don. B. I. xiv. 478, 9. 

 /. albolinealus, Gr. I. E. i. 450; Ste. 111. M. vii. 187. /. bipitndorius, Ste. 111. M. 

 vii. 154, (5; (/ Mori. E. M. M. 1902, p. 120. 



9 . Body stout ; head black, with a large white vertical mark on each 

 side near the ocelli. Antennae strongly attenuate towards the apex, some- 

 what slender, eighth joint quadrate ; black, with at least a partial white 

 band. Thorax entirely black, closely punctate ; metathorax roughly punc- 

 tate, with complete upper areae, of which the areola is sub- hexagonal, 

 and apically emarginate. Scutellum white. Abdomen nitidulous, black, 

 segments six and seven dorsally white- marked ; petiole a little elevated 

 between the spiracles ; lateral areae of post-petiole closely punctate, the 

 central generally in part punctate ; second segment strongly and very 

 closely alutaceo- punctate, with the gastrocaeli rather small and deeply 

 impressed, the intervening space alutaceo-punctate, broader than the centre 

 of post-petiole ; terebra only slightly exserted. Legs black, front tibiae 

 internally reddish ; tarsi fuscous beneath ; hind coxae coarsely punctate 

 and simple. Wings a little clouded, stigma and tegulae piceous or black ; 

 areolet only slightly narrowed above. 



$ . Head black ; palpi piceous or whitish, a mark on each side of 

 clypeus and the internal orbits broadly whitish. Antennae entirely black, 

 hardly paler beneath. Thorax also black, with pronotum, usual marks 

 at radix, and sometimes below the scutellum, white ; mesothorax and 

 scutellum distinctly higher than the metathorax, which is roughly punctate 

 with complete upper areae of which the areola is sub -hexagonal and 

 apically emarginate. Scutellum entirely, or in the centre, white. Ab- 

 domen black, always with the apical margin of the first segment, except 

 generally in the centre, white ; petiole a little elevated between the 

 spiracles ; post-petiole not closely punctate, the central area generally more 

 finely than in the $ ; second segment as in 9 ; anus immaculate. Legs 

 black ; front femora ferrugineous apically within ; all the tibiae externally 

 white, hind ones apically black ; tarsi mostly white, onychii always blackish. 

 Stigma and tegulae piceous, latter sometimes white -marked. Length, 

 13-15 mm. 



Both sexes may be distinguished by their entirely downy thorax, the 

 very broad white frontal mark, and the broad, smooth or only partly punc- 

 tate central area of the post-petiole. 



This is a very constant species, yet slight varieties are known, such as 

 the ? being more or less piceous or fuscous on the abdomen, or having 

 only one anal white mark (var. pu?ict24s, Berth.) ; and the $ may have the 

 first segment very rarely entirely black, the base and apex of the scutellum 

 black, or even a white dorsal dot on the seventh segment. One of the last 



