THE CANADIAN ENTOMOLOGIST. 169 



THE COLEOPTERA OF CANADA. 



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



XXV. The Cera.mbycid.e of Ontario and Quebec. — (Continued.) 



Atimia, Hald. 



Represented by A. con/usa, Say, the only Canadian species of the 

 group Atimioides. Aside from the structural peculiarities given in the 

 table of genera, it may be characterized by the blackish colour and the 

 punctate surface clothed with rather long yellowish pubescence, which is 

 irregularly disposed so as to leave abraded smooth spots. The elytra are 

 broader than prothorax, truncate at tip. Length, .33-. 40 inch. 



Necydalis, Linn. 



This genus, by the short elytra, bears some resemblance to Molorchus. 

 The third and fourth antennal joints together are distinctly longer than 

 the fifth. Our species is N. tneliitus, Say, unknown to me, but described 

 by Mr. Leng as being of variable colour, " usually rufo-testaceous, head, 

 antennas (base and tip tinged with rufous), thorax, scutellum and abdomen 

 above black ; elytra punctate, more coarsely toward the margin ; reddish- 

 brown, with paler spot at tip or entirely rufo-testaceous." The elytra are 

 marked by an oblique impression which is not deep and does not reach 

 the tip. Length, .60-.84 inch. 



Desmocerus, Serv, 



D. paliiaius, Forst., is found on the elder (Sambucus) in July. It 

 is a very showy beetle, with narrow head, deeply impressed above, bell- 

 shaped prothorax, and faintly costate elytra. Colour blue except the 

 base of the elytra, which is broadly orange or yellow. Length, .70-.90 

 inch. This insect can be mistaken for no other Longhorn. 



Toxotus, Serv. 



" This genus is sharply defined by the spurs of the hind tibije, which 

 are inserted at the base of a deep excavation instead of at the extreme 

 end." — (Leng.) This character is of easy verification, and is in itself 

 sufficient for the separation of Toxotus from other Lepluroides. A 

 modification of Mr. Leng's table may be used for the Canadian forms. 



A. Elytra striped, black with marginal and discal yellowish vitta. .60- 



.68 in trivittatus, Say. 



AA. Elytra unicolorous or nearly bu. 



