252 COLEOPTERA OF NORTH AMERICA. 



collaris Lee. is found from Maine to Oregon. Prothalpia is 

 founded on P. undata Lee., from Louisiana, a brown, shining, 

 punctured insect (-27 unc. long), clothed sparsely with pale hairs, 

 and having the elytra pale, coarsely punctured, and ornamented 

 with narrow fuscous spots, which are partly confluent into three 

 transverse bands ; the thorax is semicircular, slightly sinuous at 

 the base, the middle of which is feebly emarginate ; it is more 

 densely and less coarsely punctured than the elytra, and is dusky, 

 except at the sides ; there are three impressions near the base, the 

 middle one broad, and the other two smaller and deeper. The 

 antennae are longer than the head and thorax, slightly thickened 

 externally, dusky, with the base pale; the third joint is a little 

 longer than the fourth ; the maxillary palpi are not at all serri- 

 form ; the feet and palpi are pale. 



Group VI.— Nothi. 



Head inclined ; antenna? subserrate, not thickened externally ; 

 maxillary palpi with the last joint large, dilated, nearly cultri- 

 form ; anterior coxae conical contiguous, with large trochantin ; 

 middle coxae nearly but not quite contiguous ; tibial spurs obso- 

 lete, tarsi with penultimate joint conspicuously lobed, claws with 

 a broad rectangular dilatation at base in the female, trifid in the 

 male. 



This group contains but one genus, Nothus, found on flowers ; 

 it is represented by two species in the Atlantic States ; they have 

 much the appearance of Telephorus. In the males the hind 

 femora are curved, and the tibiae armed with a process on the 

 inner margin near the tip. 



Tribe III.— STENOTRACHEEIMI. 



Head horizontal ; antennas nearly filiform ; maxillary palpi 

 with the last joint large, securiform; anterior coxae conical, con- 

 tiguous, with distinct trochantin ; middle coxas absolutely con- 

 tiguous, tibial spurs slender; tarsi filiform; claws cleft to the 

 base, with the inferior portion as long as, but more slender than 

 the upper. 



Stenotrachelus arctatus Lee. (Helops arctatus Say ; Sten. ob- 

 scurus Mann.), alone represents this tribe in our fauna. It is 

 found from Lake Superior to Russian America, and is a slender 



