220 COLEOPTERA OF NORTH AMERICA. 



We have combined with Chariessa, Felonium Spiu., as there 

 does not appear to be aay sufficieut cliaracter to separate theiu. 

 The species having the sides of the thorax sinuate, diti'er by the 

 anterior tibiae not being serrate externally, and they have there- 

 fore been separated to form the genus Cregya: they are Fdonium 

 vetustum Spin., Enoplium fasciatuyn Lee, and CVerw.s 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 aiiteniiEe 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 siH'cies of 

 Necrobia 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 

 antennae compact ; 



Palpi with the last joint elongate, truncate. Necrobia. 



Palpi with the last joint subulate. 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. The species 

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

 short black hairs: Dr. LeConte has named it L. rubidus ; but 

 it does not differ from the European L. Erichsonii. 



Fam. XLVIL— ptinidae. 



Mentura usuallj' small and quadrate, sometimes larger 

 and transverse, corneous; ligula membranous or coriaceous, 

 without paraglosste; palpi 8-jointed, short. 



Maxillae exposed at base, with two ciliate lobes, the in- 

 ternal one sometimes very small; palpi 4-jointed, short. 



Antennas inserted upon the front in the first sub-family, 

 at the sides of the front in the others, having from 9-11 

 joints, variable in form. 



