ORDER COLEOPTERA. 431 



ceding, ovoid, cylindrical, whose body is but little raised, 

 with the end of the elytra truncated, or very obtuse, compose 

 the genus, 



LiMNEBius of Dr. Leach. 



Those whose maxillary palpi arc but little longer than the 

 antennae, with the last articulation as long, or longer than the 

 preceding, almost ovaliform, and whose body is gibbous, are 

 comprised by the same English naturalist in two other ge- 

 nera. The one, that of 



Hydrobius, 



Has the eyes depressed, or but little convex. The anterior 

 extremity of the head is not narrowed abruptly, and the base 

 of the corslet is of the breadth of that of the elytra.-h 



Berosus 



Have, on the contrary, very prominent eyes, the anterior ex- 

 tremity of the head abruptly narrowed, and the corslet more 

 narrow at its base than the elytra. The body is very gib- 

 bous. {H. luridus. Fab.) 



The second tribe, Sthceridiota, is formed of terrestrial 

 palpicornes, with tarsi composed of five very distinct articu- 

 lations, and the first at least as long as the following. The 

 maxillary palpi are a little shorter than the antenna?, with 

 the third articulation larger, inflated, and in the form of a 

 reversed cone. The maxillary lobes are membranous. 



The body is almost hemispherical, with the presternum 

 prolonged into a point at its posterior extremity, and the legs 

 spinous. The anterior ones are palmate, or digitate in the 

 large species. The antennae are always composed of nine 

 articulations, or simply of eight, if we consider the last as 



* H. griseus, iruncatellus. Fab. 

 ■j- H. scarabacoides, melanocephalus^ &c. 



