British Braconidce. 77 



5. Perilitus bicolor, Wesin. 



Perilitus conterminus, Hal., Ent. Mag., iii., 36, $ ; 



SchiifL, F. G., clvi. (not of Nees). 

 P. seealis, var. y, Hal., 1. c, ? . 

 Microctonus bicolor, Wesni., Nouv. Mem. Ac. Brux., 



1835, p. 61, 6* ; Euthe, Stett. Zeit., 1856, p. 294, 



$ ? (not of Batz.). 

 Leiophron basalis, Cur., B. E., 476, 6a, 6* . 



Variable, rufescent, face, mouth, and legs rafo-testaceous ; thorax 

 above, and abdomen after the 1st segment, black ; antenna} fuscous, 

 rufo-testaceous at the base. Wings subhyaline, stigma and ner- 

 vures lutescent or pale fuscous ; radial areolet sublanceolate, acute, 

 ending nearer to the stigma than to the apex of the wing. Labial 

 palpi 3-jointed. Terebra straight, as long as half the abdomen. 

 $ ? . Length, f — 1^ ; wings, \\ — 2i lin. 



Head and thorax more or less rufous, piceous, or black; abdo- 

 men black or piceous, the 1st segment at least generally rufo- 

 testaceous ; in one J , however, this is also blackish. The smaller 

 individuals are the males. Palpi, according to Haliday, nearly as 

 in seealis (sp. G), but the 1st joint of the maxillary is less abbre- 

 viated, the 2d and 3d increasing in length. Antenna} shorter than 

 the body, those of the ? 18-, of the $ 20 — 21-jointed ; but in one 

 5 they are 24-jointed. Mesothoracic sutures impunctate, ending 

 in a small aciculated space before the scutellum. Metathorax 

 areated, sublsevigated, not sensibly excavated behind, short, almost 

 vertically truncated. First abdominal segment striolated ; petiole 

 slender ; tubercles salient just behind the middle ; condylus twice 

 as broad as the petiole, its sides almost parallel ; hinder part of the 

 abdomen ovate-orbiculate. The J with 24-jointed antenna} is not 

 otherwise different, and certainly belongs to this species. 



The colour of the abdomen, black posteriorly, and 

 having the 1st segment rufous, is an obvious distinctive 

 character. P. seealis has also 3-jointed labial palpi, 

 but the tubercles are less conspicuous, and the abdomen 

 is not rufous at the base. Haliday saw in the present 

 species the P. conterminus, Nees, referring only to the $ 

 with 21- (i. e., 20-) jointed antennae. The ? , according 

 to Nees, has 24- (i. e., 23-) jointed anteimrc, and may be 

 rightly paired with his $ , notwithstanding Wesmael's 

 just remark that the antennae of the 2 ought to have 

 fewer joints than those of the $ . The difficulty, as 

 regards conterminus, consists in the remark of Nees that 



