1896.] of the Coleoptera of South Africa. 589 



Trechus ambiguus. 



Piceous black, shining ; antennae and palpi black ; head and 

 prothorax smooth, truncate at apex and base, ampliated laterally in 

 the anterior part, narrowed towards the base, with the posterior 

 angles projecting ; elytra elongato-ovate, smooth, broader at the 

 base than the prothorax at its widest part, and having on each side, 

 parallel and close to the suture, three striae, the first one only reaches 

 near the apex, and the second is a little longer than the third ; 

 under side and legs piceous ; anterior tibiae not truncate diagonally 

 on the outer apical side. Length 5 mm. ; width 2 mm. 



Hah. Cape Colony (Stellenbosch). 



The examples I have captured are all immature, and it is from 

 surmise only that I describe them as piceous black ; as a matter of 

 fact they are of a livid colour, but the striation of the elytra, as well 

 as the grooves on the head and prothorax, are very well defined. 



Teechus pallipes, Bohem., 

 Insect. Caffr., i., p. 297. 



Ferruginous brown ; antennae, palpi, and legs flave scent ; head 

 smooth ; prothorax also smooth, not much narrowed towards the 

 base, and with the posterior angles sharp ; elytra subovate, smooth, 

 and having on each side five dorsal, well-defined striae, and a sixth 

 one hardly noticeable or quite wanting ; under side black or piceous 

 black. Length 5^ mm. ; width 2 mm. 



Hah. Cape Colony (Stellenbosch, Ceres, King William's Town, 

 Somerset East). 



Trechus rufipes, Bohem., 

 Insect. Caffr., i., p. 226. 



Longer and broader than the preceding species, and also darker ; 

 prothorax more ampliate laterally in the anterior part, and also more 

 attenuate towards the base ; elytra with six striae well defined, the 

 sixth one shorter than the others. Length 7 mm. ; width 3 mm. 



Hah. Caffraria, exact locality unknown. 



Trechus affinis. 



Ferruginous red, shining, and smooth ; size and shape of T, 

 rufipes, and closely allied to it ; the elytra, however, are a little more 

 oblong, the six dorsal striae are very distinct, but there is also a 

 seventh stria nearly as well defined as the sixth and nearly equally 

 long, that is to say reaching to about four-fifths of the length, and 

 also a more or less distinct supra-marginal one ; under side piceous. 

 Length 6 J mm. ; width 3 mm. 



Hah. Cape Colony (Stellenbosch). 



