94 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Salient type-characters. — Head rather large, coarsely and deeply 

 punctate. Antenna? short and robust. Prothorax with apex nearly 

 as wide as the base; sides strongly arcuate anteriorly, conspicuously 

 convergent and almost perfectly straight in basal two-thirds; disc 

 widest at apical third, rather sparsely, coarsely and deeply punctate, 

 punctures about twice as large and distant as those of hvmeralis. 



Elytra distinctly less than twice as long as the prothorax; disc 

 rather depressed above, very coarsely, deeply, and densely punctate, 

 the punctures irregularly arranged Avithout trace of impressed stride, 

 not nniricate but producing a strongly rugulose appearance by mutual 

 semi-coalescence. Legs short and robust (Casey). 



Diagnostic characters. — Cuneatlcollis differs from all the other 

 species of the present subgenus in having the elytra strongly rugulose 

 from semi -coalescence of the coarse punctures. As Casey writes, it 

 belongs near humeralis., but differs in four important characters, 

 namely : " The much shorter and robust antenna^ and legs, the very 

 much coarser and dee^Der elytral sculpture, and coarser, sparser pro- 

 notal punctures, and finally the smaller and much less unequal spurs 

 of the anterior tibia? in the male, the larger spur in humeralis being 

 nearly four times as long as the smaller one." In the largest females 

 before me the humeri are exposed. 



The most noticeable disj^arity in the elytral characters of Casey's 

 type and the series before me, is that, while in the type the elytra 

 are distinctly less than twice as long as the prothorax, in all the 

 examples before me the eh'tra are distinctly a little more tlian twice 

 as long as the same. My series agrees in all other particulars with 

 the original description. I have not seen any other species that could 

 be referred to cuneaticoWis ; Casey does not mention the number of 

 specimens he had before him at the time of w^riting his description, 

 but specimens do occasionally have unusually short elytra in other 

 species. In some examples the elytra are vaguely substriate when 

 viewed longitudinally. 



The individual specimens of cuneaticollis exhibit considerable 

 variability, more so than hi the other related species. The largest 

 female before me has abnormally short legs, another has the sides of 

 the prothorax unusually and strongly rounded in the anterior third; 

 the antennu' are n()tieeal)ly more robust and shorter in some specimens 

 than others, I believe the present species to be more closely related to 

 guadricollis than to humeralis; the anterior tibial spurs suggest this 

 relationship. 



The mentum is subparabolic to triangulo-parabolic, not coarsely but 

 densely pnnctate, and not noticeably setose; surface more or less 

 foveate laterally and broadly convex centrally. 



The prosternum iind mesosternum arc variable, as in hu?)ieralis. 



