328 COLEOPTERA OF 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 



iu certain Acmaeops). 



a. Prostemuni prominent between the coxae. Stenocorus. 



b. Prosternum not prominent, front coxse conical, protuberant ; head 



not suddenly constricted behind. (TOXOTI.) 



Eyes large, coarsely granulated. Centrodera. 



Eyes smaller, coarsely granulated. Xylosteus. 



Tibial spurs not terminal (eyes variable). Toxotus. 

 Eyes finely granulated, tibial spurs terminal ; 

 Prothorax acutely armed on the sides ; 



Eyes moderate, feebly emarginate. Pachtta. 



Eyes large, strongly emarginate. Anthophylax. 



Eyes very small, entire. Piodes. 

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

 entire ; 



Mesosternum not protuberant. Acmseops. 



Mesosternum protuberant. Gadrotes. 



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. (LEPTURyE.) 



Last ventral segment of % deeply excavated ; body very slender ; 



Elytra strongly sinuate on the sides ; antennae without porifer- 

 ous spaces. Bellamira 



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 coxae contiguous. Euryptera. 



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

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

 States. 



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



Stenocorus Geoffroy is equivalent to Rhagium Fabr. 



