of the Royal Physical Society. 315 



those on the rest of the elytra, and seem to be rather more 

 transverse. 



In other respects the characters of the two species corre- 

 spond. Their extreme similarity, except in the form of the 

 thorax, suggests the idea that they may possibly be sexes of the 

 same species. As the tarsi in this genus furnish no indication 

 of the sex, I endeavoured to satisfy myself on this point by de- 

 taching the abdomen and dissecting out the sexual organs, 

 which I found, although not very decipherable, to be at least 

 exactly the same in both species. They would appear therefore 

 not to be sexes of the same species. Neither do I think they 

 can be varieties, the difference of form in the thorax being too 

 great to allow of such a supposition. I should also mention 

 that I have received specimens of conicus in several consign- 

 ments, but strangulatus came only upon one occasion, and then 

 in small numbers. 



3. Cr. arcuaio-collis, mihi. 



Niger, pilosus, depressiusculus ; capite latiore ; F *g- 6- 



thorace depresso, lateribus rotundatis, ad basin 



una et altera parte arcuato, profunde punctato, 



lateribus posticis lsevioribus ; elytris punctata- 



striatis, maculis duabus flavis, singulis inter- 



stitia quinque tegentibus, altera antica recte 



transversa, altera postica oblique transversa. 

 Long. 1\ lin., lat. 3 \ lin. 



Black, pilose. Head broad, polished, margined on each side 

 in front of the eyes, very coarsely punctured over the whole 

 surface of the head, except upon the clypeus, which is large, 

 semicircular, and straight in front ; it is less closely punctate 

 on the neck ; there are two not very deep depressions more 

 closely punctate on each side in front ; labrum pitchy ; palpi 

 ferruginous, terminal joints pilose; antennae not so long as 

 half the body, filiform. Thorax somewhat quadrate, depressed, 

 coarsely punctured, narrowest in front, sides rounded and mar- 

 gined, anterior angles rounded and projecting, posterior angles 

 rounded-in, with a minute tooth caused by a small excision at 

 the angle ; basal margin arched on each side towards the angles, 

 middle space nearly straight, projecting backwards in conse- 

 quence of the arch on each side ; dorsal line well marked ; an 

 inner depression a short distance within the lateral margin, fol- 

 lowing somewhat its line, nearest to it in front, diverging from 

 it behind, more deeply punctate than the rest of the surface, 

 behind joining a basal depression about half-way between the 

 middle and the exterior angle, the basal depression not separated 



