THE CANADIAN ENTOMOLOGIST. 37 



THE COLEOPTERA OF CANADA. 



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



XXVIII. The Cerambycid.^ of Ontario and Quebec. 



Liopus, Serv. 



Resembles the preceding genus in form, but the angulation or 



tuberculation of the prothoracic flanks is better marked. The Canadian 



species are few. Mr. Leng has thus defined them, following, in the 



main, a previous arrangement of Dr. Horn : 



A. Front flat, mouth in same plane. Elytra without angular mark 



posteriorly, sides of thorax arcuate, the spine small and acute. 



Elytra without erect scales. .24-48 in variegatus, Hald. 



AA. Front convex, mouth slightly retracted ; lateral spine of prothorax 

 rather distant from base. Elytra without distinct tufts of erect 

 scales, 

 b. Elytra with an acutely angular band behind the middle, which 

 is^ however, sometimes wanting. 



Surface finely punctured, almost impunctured behind the 



band. .16-. 28 in alpha, Sdiy. 



Surface more coarsely punctured, very distinctly so behind 

 the band. .16-. 28 in cinereus, Lee. 



bb. Elytra with a feebly marked post-median band of whitish 

 pubescence in place of the angulate line. .20 -.25 



in pundatiis, Hald. 



Liopus alpha and cinereus are united by Mr. Leng under the former 

 name, the differences given above becoming evanescent in long series. Z. 

 variegatus is said to breed in box elder, L. alpha in apple, and L. 

 cinereus in hickory and locust.* 



Lepturges, Bates. 



In this genus the spine of the prothorax is quite near the base. The 



following table has the same origin as the preceding : 



A. Lateral spine of prothorax rather broad, very close to the base. 



Colour usually pale with short gray pubescence, black markings 



as follows : Four spots on the thorax, two on each elytron near 



the base and close to the suture, a lateral stripe before the middle 



connected with a broad irregular transverse band, and three (often 



*In the table of genera the genus Leptostylus is said to have the prothorax " fully 

 tuberculate." It sbo«ld rea4 *' feebly tuberculat?." 



