328 COLEOPTERA OP NORTH AMERICA. 



times subserrate ; the prothorax is usually wider at base, some- 

 times tuberculated at the sides; the elytra usually narrowed from 

 the base, sometimes bispinose at tip, sometimes acute and dehis- 

 cent, but usually rounded and dehiscent. 



The species occur on flowers, are generally prettily colored, 

 and usually clothed with fine pubescence. 



A. First joint of hind tarsi with the usual brush of hair beneath (except 



in certain Acmaeops). 



a. Prosternum prominent between the coxae. STENOCORUS. 

 6. Prosternum not prominent, front coxae conical, protuberant ; head 



not suddenly constricted behind. (TOXOTI.) 



Eyes large, coarsely granulated. CENTRODEEA. 



Eyes smaller, coarsely granulated. XYLOSTEUS. 



Tibial spurs not terminal (eyes variable). TOXOTUS. 

 Eyea finely granulated, tibial spurs terminal ; 

 Prothorax acutely armed on the sides ; 



Eyes moderate, feebly emarginate. PACHYTA. 



Eyes large, strongly emarginate. ANTHOPHYLAX. 



Eyes very small, entire. PIODES. 



Prothorax obtusely angulated or rounded on the sides ; eyes small, 



entire ; 



Mesosternum not protuberant. ACM^KOPS. 



Mesosternum protuberant. GAUROTES. 



B. 1st joint of hind tarsi without brush-like sole ; prosternum not promi- 



nent ; head strongly and suddenly constricted behind ; eyes finely 

 granulated, deeply emarginate. (LEPTUR2E.) 



Last ventral segment of deeply excavated ; body very slender ; 

 Elytra strongly sinuate on the sides ; antennae without porifer- 

 ous spaces. BELLAMIEA 

 Elytra less sinuate on the sides ; antennae with poriferous spaces 



on the outer joints. STRANGALIA. 



Last ventral segment of not excavated ; 



Antennae with large poriferous spaces. TYPOCERUS. 



Antennae without poriferous spaces ; 



Hind coxae not contiguous. LEPTURA. 



Hind cox33 contiguous. EDRYPTERA. 



The type and only species of Bellamira is the large and elegant 

 Leptura scalaris Say(Toxotus coarctatus Hold.) of the Atlantic 

 States. 



To Euryptera belongs Lept. lateralis Oliv. (distans Germ.). 



Stenocorus Geoffrey is equivalent to Rhagium Fabr. 



