BEETLES. 143 



Genus Asemum, Eschsch. 

 Pronotum rounded, rather narrower than the elytra, but not 

 flattened, with only a few indistinct pits. The only British 

 species is : 



* A. striatum, Linn. (Plate XVI., Pig. 8). This is dull 

 black, with three longitudinal striae on the elytra, which are 

 rarely brown. It is found in old fir and pine stumps in Scotland. 



Genus Criocephalus, Muls. 



Wing-cases only slightly broader than the pronotum, and 

 nearly three times as long as the breadth of both. The 

 females have a projecting ovipositor. 



C. rustims, Linn. (Plate XVL, Pig. 9). Brown, with two 

 or more small pits on the pronotum. The wing-cases have 

 three longitudinal striae. It is found in the roots of felled 

 pine-trees in various parts of the Continent. 



Genus Clytus, Pabr. 

 Pronotum elongated or rounded, and more or less globularly 

 convex. Wing-cases generally as broad as the pronotum. Upper 

 surface of the body pubescent. They live on flowers and on 

 felled timber. The larvae are found in wood. 



G. detritus, Linn. (Plate XVL, Pig. 10). Elytra black or 

 brown, with four or five yellow bands, the hinder ones more or 

 less coalescing. It is found on oaks on the Continent. 



* C. arcuatus, Linn. (Plate XVL, Fig. 11). Elytra with four 

 or five narrow, curved, yellow bands, and a yellow patch on the 

 suture. It is found on willows, oaks, and beech trees, and is 

 very rare in Britain. 



C. liciatus, Linn. (Plate XVL, Pig. 12). Wing-cases 

 rounded at the extremity, with several whitish zigzag bands. 



