32 THE CANADIAN ENTOMOLOGIST. 



rarely with two large yellowish spots on each. 



. 1 4-. 15 in qi/ercata, Fabr. 



While flavocyanea is included in the above table, on account of its 

 being recorded in the Society's list, it has probably been identified in 

 error, since it is a Southern species. 



DisoNYCHA, Chevr. 



Also contains large or moderate sized species, some of them even 

 exceeding (Edionychis, which they often resemble in markings, but they 

 may easily be separated therefrom by the claw-joint of the hind tarsi not 

 being swollen. They separate thus : 



A. Elytra not striped. 



Thorax yellow with three black spots arranged in the form of a 

 triangle; under surface of body and the legs black .20-. 25 

 in triangtdaris, Say. 



Thorax yellow, not spotted; abdomen yellow, femora usually 

 yellow at basal half .21-. 23 in xanthomelcena, Dalm. 



AA. Elytra striped. 



b. Form very elongate; elytra vaguely grooved ; thorax somewhat 

 uneven. 



Body beneath black, except sides of thorax, which are margined 

 with yellow. Black spot on disk of thorax very 

 large var. limbicoliis, Lee. 



Body beneath partly black, abdomen paler at sides and apex, 

 thorax with under surface entirely yellow, discal spot on 



upper surface smaller. .26-30 in pennsyivanica, 111. 



bb. Form not very elongate ; elytra and thorax even, the former with 

 discal and submarginal vittae. 



c. Abdomen densely punctured, conspicuously pubescent. 



d. Head coarsely punctured from side to side. .2 2-. 36 



in quingiievittata, Say. 



dd. Head smooth at middle. 



Elytral vittae rather broad, head and body beneath more 

 or less clouded with darker, labrum piceous. .2 2-. 26 



in cretiicollis, Say. 



Elytral vittae narrow, head and body beneath always pale 

 yellow, labrum pale. .20-.26 in. . .caroiiniana, Fabr. 



