THE CANADIAN ENTOMOLOGIST. 199 



THE COLEOPTERA OF CANADA. 



BY H. F. WICKHAM, IOWA CITY, IOWA. 



XVIII. The Chrysomelid^e of Ontario and Quebec — (Continued). 



Tribe VIII. — Chrysomelini. 



Most of the members of this tribe are of at least moderate size, and 

 are often quite ornately coloured. In form they are usually robust and 

 convex, while lacking the rotundity of the Cryptocephalini. The genera 

 of Eastern Canada may be arranged thus, the characters used being in 

 the main drawn from the Leconte and Horn " Classification " : — 

 A. Anterior coxal cavities closed, metasternum long ; reddish-yellow 



above, with black stripes Entomoscelis. 



AA. Anterior coxal cavities open, 

 b. Claws simple, not toothed. 



c. Tarsi with third joint entire or scarcely emarginate. 



Prothorax not margined at base ; species rather elongate, 



slightly convex, striped Prasocuris. 



Prothorax margined at base ; species larger, more robust 

 and convex. 



Last joint of palpi truncate Doryphora, 



Last joint of palpi dilated Chrysomela. 



cc. Tarsi with third joint emarginate or bilobed. 



Elytra spotted or spotted and striped. Prothorax with a 



thickened margin Li?ia. 



Elytra unicolorous^ not spotted nor striped, except that the 

 metallic gloss is sometimes intensified over longitudinal 

 lines. 



Elytra with regular punctured striae Plagiodera. 



Elytral punctuation dense and confused. . . Gastroidea. 

 bb. Claws toothed or bifid. 



Tibiffi dilated and toothed near the tip. Species of oblong, 



rather convex form ; yellow with black spots. . . Gonioctena. 



Tibiae slender, neither dilated nor toothed Phyllodecta. 



Entomoscelis, Chev. 



E. adonidts, Fabr., is about .33 in. long, less robust than most of 

 the Chrysomelini ; the upper surface of the body dark reddish-yellow ; 

 the mouth-parts, sides of head, broad median stripe (and usually small 

 lateral spot) on thorax, suture, and broad lateral stripe on elytra, black, 



