24 roicus. 



truncate. The tibia (Tab. I. fig. 5 g) is robust, of equal length 

 with the anterior tibiae, gradually incurved downwards and inwards 

 through its whole length, subdilated towards the apex : when viewed 

 obliquely, the posterior surface is flattened, having the appearance 

 of being in fonn triangular rather than subcylindrical ; the edges of 

 this flattened side are distinctly marginate ; in the inner margina- 

 tum, near the apex, is a well-developed angular projection ; while at 

 the apex itself, immediately behind the insertion of the tarsus, is a 

 prominent and robust tooth-like claw. The tarsus (Tab. I. fig. 5 h) 

 is short, the first joint being subelongate, and attenuated at the 

 base ; the second and third are narrower and much shorter, ovate 

 (the third joint being somewhat smaller, and not bilobed) ; the apical 

 joint is elongate, impubescent, gradually incrassated from the apex, 

 terminating at its extremity in a bladder-like inflation which partially 

 conceals the terminal claw. The claw is bifid ; at the inner surface 

 there is a greater tendency to a tooth-like prominence than in those 

 of the anterior legs. 



1. Roicus sexmaculatus. (Tab. I. fig. 5.) 



K. oblongo-ovalis, subcylindricsus, parallelus, jiavus, nitidtis ; ca- 



pite brevi, inter ocidos transverse foveolato ; thorace magna, sub- 

 elongato, ad latera in medio angulato, impwictato ; elytris 

 punctis inin litis, veluti in striis, ordinatis, maculis sex rufo- 

 testaceis ; antennis fusco-fiavis j pedibus robustis, tibiis curvatis, 

 his {cum tarsis) rufo-fuscis, femorihns testaceis. 



Long. corp. 3^ lin., lat. corp. 1^- lin. 



Oblong-oval, subcylindrical, elongated, testaceous. Head short, 

 depressed, very slightly produced ; the eyes are situated at some 

 distance from the back of the head ; insertion of the antennae con- 

 tiguous ; above the insertion and between the eyes is a transverse 

 depression (deepest and broadest in the middle) extending obliquely 

 to the upper surface of the eyes ; mouth and maxillary palpi fer- 

 rugineous; lower part of the head testaceous, the upper part impunc- 

 tate, testaceous. Thorax quadrate ; from the anterior, and also from 

 the posterior angles, the sides gradually expand, forming at the side, 

 antemedially, a prominent angle, slightly marginated ; surface me- 

 dially depressed (although it seems doubtful whether the depression, 

 in the example before me, be not the result of accident), impunctate, 

 glabrous ; flavous, at the sides very slightly suffused with rufous. 

 Scutellum triangular, impunctate, rufo-fuscous. Elytra not much 

 broader than the thorax, parallel, subcylindrical, with very faint and 

 obsolete punctures arranged as strife (these are only visible under a 

 high magnifying power), the surface appearing under an ordinary 



