198 COLEOPTERA OF NORTH AMERICA. 



I have combined with Chariessa, Pelonium Spin., as there doe? 

 not appear to be any sufficient character to separate them. The 

 species having the sides of the thorax sinuate, differ by the anterior 

 tibia? not being serrate externally, and I have therefore separated 

 them to form the new genus Cregya : they are Pelonium vetustum 

 Spin., Enoplium fasciatum Lee, and Clerus oculatus Say. Of 

 these genera Chariessa and Cregya are represented in the Pacific 

 as well as in the Atlantic districts. 



Group II.— Corynetes. 



Insects of small size, with the antennae 11-jointed, the last three 

 joints forming a small club ; the maxillary palpi are longer than 

 the labial, which are only of ordinary length, and not of large size 

 as in the preceding members of this family. Our species of Ne- 

 crobia have been introduced from Europe, and live on animal 

 materials in houses, and in dried carrion in the open air. 



The genera are as follows : — 



First joint of tarsi equal to the second ; 



Club of antennae elongated, loose. Lebasiella. 



Club of antennae small, compact. Laricobius. 

 First joint of tarsi shorter and partly covered by the second, club of anten- 

 nae compact ; 



Palpi with the last joint elongate, truncate. Necrobia. 



Palpi with the last joint suhulate. Opetiopalpus. 



The genus Laricobius is remarkable for the elytra having rows 

 of large quadrate punctures : the thorax is smaller than usual, 

 transverse, marked with large scattered punctures. Our species 

 is one-tenth of an inch long, of a brownish-red color, clothed with 

 short black hairs : I have named it L. rubidus ; it was found 

 near Washington, D. C, by Mr. H. Ulke. 



Fam. xliil— lymex ylid ae. 



Mentum small, quadrate, corneous; ligula coriaceous, small; 

 palpi 3-jointed. 



Maxillae exposed at base, witb. two small ciliate lobes ; 

 palpi 4-jointed, stout, in the male very large, flabellate. 



Antennas inserted at the sides of the bead, 11-jointed. ser- 

 rate. 



