THE CANADIAN ENTOMOLOGIST. 259 



THE COLEOPTERA OF CANADA. 



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



IV. The Pleurostict Scarabaeid^ of Ontario and Quebec. 

 In this group we have in some of the genera a return to the cephalic 

 and thoracic ornamentation by horns or tubercles in the males, as shown 

 in the Coprophaga ; however, none of the Canadian species would be 

 thus misplaced by anyone having even a slight acquaintance with the 

 family, as aside from this character the resemblance is slight. From some 

 of the Melolonthinae they are not so readily distinguished, except by the 

 position of the spiracles, as defined in a previous article. The genera may 

 be thus separted among themselves : 

 A. Claws of tarsi unequal in size. 



b. Length not more than about ^ in. Antennae 9-jointed. 



Elytra conjointly very convex above, ofien more or less distinctly 



striate and punctate in rows Anomala. 



Elytra flat, distinctly sulcate Strigodenna. 



bb. Length greater, nearly or quite an inch. Antenuce lo-jointed. 



Elytra immaculate , Cotalpa. 



Elytra with black spots Pelidnota, 



A A. Claws of tarsi equal. 

 :. c. Very small (about 25 in.). Colour brown, with indistinct 



lighter marks, thorax distinctly channelled Valgus. 



cc. Larger (.40 to above an inch). 



d. Elytra deeply sinuate behind the humeri Etcphoria. 



dd. Elytra without more than a faint indication of this sinuation. 



e. Thorax much narrower than elytra, often much nar- 

 rowed at base, 

 f. Size small (.50 in. or less). 



Colour uniform black.. Crernastochilus. 



Elytra luteous with black spots Gnorittius. 



Elytra rufotestaceous, or with transverse bands 



of that colour and white Trichius. 



ff. Size large (nearly an inch), colour 



uniform Osmoderma. 



ee. Thorax not narrowed at base beyond the effect pro- 

 duced by the rounding of the sides and about as 

 wide as the elytra. 



g. Head entirely unarmed, clypeus 



simple Cyclocephala. 



