Collection of the British Museum. 87 



Vatinm. 



Genus Heteroch^ta, Westw. 

 (Arc. Ent. i. p. 161, pi. xli., 1845.) 



Ileterochceta orientalis, sp. n. 



Long. corp. 115, long, pronot. 50, exp. al. 120 mm. 



General colour reddish grey ; head deeply concave in front, 

 semicircular, the vertex forming a narrow transverse carina, 

 at least in the female, and the eyes curving outwards and 

 forwards, very large, and ending in a large conical spine. 

 Pronotum narrowed in front and strongly granulated, carinated, 

 laterally serrated before the enlargement above the coxa?, 

 which is moderate, and bordered by a narrow rounded ridge. 

 Hind part of prothorax with a middle carina and distinctly 

 raised at the extremity. Front coxaj minutely serrated above 

 and very strongly and irregularly dentated below, but more 

 strongly in the female than in the male. Two teeth near the 

 base and one before the extremity are the largest. Middle 

 and hind femora with small dentated lobes at the extremity 

 beneath. 



Tegmina varied with reddish, and subhyaline grey, the 

 reddish colour increasing and becoming more uniform towards 

 the extremity ; inner margin hyaline. Wings on the costal 

 area almost hyaline, with transverse dark spots ; apex yellow, 

 preceded by a large steel-blue blotch. The rest of the wing 

 is clear subhyaline yellow, divided by narrow undulating 

 steel-blue bands in the male, which are broader and anasto- 

 mose in the female. 



Hob. Luitpoldhette, East Africa ( <$ ) ; German hast 

 Africa ( ? ) ; British East Africa (immature <J). 



It is probably this species to which Gerstaecker alludes 

 (Mitth. Ver. Neu-Vorpomm. xiv. p. 94, 1883) as a variety of 

 the very distinct West-African H. te?iuipes, Westw. 



Genus PsEUDOCH^TA, nov. 



Allied to Heterochceta, Westw. ; eyes shorter, obtusely 

 conical, and ending in a blunt point instead of a long spine ; 

 ocelli very prominent; middle and hind femora with rounded 

 denticulated lateral lobes j cerci jointed and laminated. 



