BY THOMAS G. SLOANB. 217 



This species only differs from the preceding [P. divhwides] by- 

 its smaller size, and by the shape of the prothorax which is quite 

 different ; it is almost globular and seems hardly narrowed behind 

 because the sides are very little dilated or rounded in front ; the 

 median line does not present a noticeable depression, though it is 

 strongly impressed ; the striae of the elytra are a little more distinct 

 and punctate. Length 5^, elytra 5, breadth 3J mm. In spite 

 of these differences I suspect P. dyschirioides to be a small-sized 

 variety of P. clivinoides. Guerin's type is a ,J from the Swan 

 River. 



In his " Revision " he adds that the prothorax is equally nar- 

 rowed in front and behind ; and that compared with P. clivinoides 

 the -elytra are a little more elongate and less widened in the middle, 

 while the legs are always red ; also that de Castelnau's specimens 

 came from Champion Bay and Esperance Bay. 



Pkomecoderus scauroides. 



P. scauroides, Casteln. I.e. p. 169 ; Putz. Revis. 1873, p. 336. 



This species is also unknown to me. 



M. Putzeys dismisses it in his " Revision " with merely a short 

 comparison with P. clivinoides from which he says it differs but 

 little, its chief characters being — the prothorax less narrowed and 

 rounded in front, and more narrowed behind ; the elytra more 

 oval and with their greatest breadth a little behind the middle, 

 usually more convex with the stripe more superficial. 



De Castelnau's description is as follows : — " Length 4'-5'; black, 

 brilliant ; head smooth, with a most feeble transverse impression 

 behind the eyes ; thorax semicircular, truncated in front, globular, 

 having two transverse impressions, one in front and the other 

 behind, and a longitudinal sulcate in the middle, extending to the 

 posterior margin ; elytra oval, with longitudinal striae, not extend- 

 ing to the lateral margin ; a punctiform impression, and a short 

 longitudinal sulcate on the posterior part of the margin ; lower 

 side of the body of a shiny brown ; segments of the abdomen 

 having on each side a punctiform impression, which extends in the 



