THE CANADIAN ENTOMOLOGIST. 83 



b. Elytra with one or more yellowish spots. 



Form oval. Head black or yellowish, thorax black, sides 



and front margin sometimes yellowish, tibise and tarsi 



always so. Elytra black, with an oval yellow spot on 



• each, one-third from apex, equally distant from side and 



suture. .06-.0S in Jlavifro?is, Melsh. 



Form elliptical. Blackish, each elytron with two obliquely 

 oval yellowish spots, sometimes coalescent. Legs red- 

 dish. .08-. 09 in ortiaius, Lee. 



bb. Elytra not spotted, but with apex yellow, this colour extend- 

 ing one-fourth or one-fifth along the suture. General 

 colour piceous, head, legs and thoracic margin yellow, 

 abdomen usually so, two basal segments sometimes dark. 



.06-.075 in terminatus, Say. 



AA. Metacoxal line forming a complete arc, beginning at the inner edge 

 of the hind coxal cavity, thence describing a curve and ending 

 nearly at the anterior angle of the segment. 



c. Form broadly oval, outline of sides of thorax with humeri 



nearly continuous. Elytra never with discal spot, apex 

 often yellow. 



d. Elytra pale at apex, sometimes narrowly so. 



e. Apical pale space of elytra about one-fifth the 

 length of the suture. Head yellowish, thorax 

 piceous, with a very wide yellow niargin. 

 Elytra black, except as stated ; abdomen 

 piceous, paler at sides and tip ; legs reddish- 

 yellow. .08 in f rater Jius, Lee. 



ee. Apical pale space narrow. 



f. Thorax partly black above. 



Colour black, sides of thorax yellowish, 

 less broadly than in the next species. 

 Elytra with narrow apical pale space, 

 abdomen often indefinitely paler at sides 

 and tip, legs pale, femora more or less 

 piceous. First ventral of male with 

 median smooth area surrounded by 

 short pubescence. .08- 

 . 10 in puncticollis^ Lee. 



