BUFFALO SOCIETY OF NATURAL SCIENCES 43 



Metopidium flat, conical in outline, the sides approaching 

 almost from the base, median carina distinct ; head short, 

 the oblique sides much exceeded by the clypeus, 



3 Wickhami VanD. 



Metopidium viewed from before widened upward to the 

 obtuse suprahumeral angles, 5. 



Metopidium regularly narrowing above the humeri, 7. 



Pronotum unusually depressed, the dorsum nearly straight; 

 lateral carinse meeting far behind the middle; metopi- 

 dium low, its sides viewed from before well rounded, 

 scarcely carinated; attenuated apex of the pronotum very 

 slender and decurved, 7, Gilletti Godg. 



Dorsum, viewed from the side, distinctly arcuated; meto- 

 pidium higher, its sides angulated or subangulated, dis 

 tinctly carinated, uniting somewhat behind the middle 

 of the dorsum; face evenly and regularly punctured, 6. 



Metopidium obviously angled either side, especially in the 

 female; carinae frequently rufous, 5, festina Say. 



Metopidium narrower and higher, the sides rounded or 

 feebly angled, 6, rotundata Stal. 



Carinate sides of the metopidium meeting far behind the 

 middle ; pronotum low, the dorsum but feebly arcuated, 



9, franciscana Stal. 



Carinate sides of the metopidium meeting at or near the 

 middle, 8. 



Larger, 8mm., and depressed; almost concolorous; face 

 roughly corrugated, scarcely punctured; clypeus and 

 lorae prominent, strongly produced, 8, collina VanD. 



Smaller, 6-6^mm., and more elevated; face smoother, 

 evenly and closely punctured; clypeus and lorae little 

 produced, 9. 



Pectus and femora black; clypeus briefly but obviously pro- 

 duced beyond the line of the cheeks, 10, lutea Walk. 



Pectus and femora concolorous or the latter but partly 

 black; clypeus broadly rounded, continuing the contour 

 of the cheeks, 11, diminuta VanD. 



