100 PROCEEDINGS OF THE ACADEMY OF 



** Thorax with base and side margin densely punctulate. 

 50 -62. Thorax narrowed in front; sides strongly depressed; elytra 

 sparsely punctulate at the sides. Atlantic States, Kansas. 



9. pensylvanicus. 



Thorax slightly narrowed behind ; sides feebly depressed ; 



54 -66. Hind angles less obtuse ; elytra not punctulate at the sides. 

 Atlantic States, Kansas . 10. compar Lee. 



54 -64. Hind angles more obtuse ; elytra finely punctured at the sides. 

 Pennsylvania, New York 11. longicollis LtcfrFHjp*jT. 



42 -48. Smaller, hind angles of thorax less obtuse ; elytra not punctu- 

 late at the sides. Atlantic States 12. erythropus Dej. 



*** Thorax scarcely punctured at base ; sides not distinctly depressed. 

 34. Head very large ; hind angles of thorax rounded ; basal fovea?, slightly 

 punctured ; elytra slightly bronzed. Lake Superior. 



13. megacephalus Lee. 

 c. Mentum tooth more or less distinct ; elytra with dorsal puncture. 

 * Antennae and feet ferruginous ; bead of prothorax yellowish. 

 | Thorax distinctly narrowed behind ; sides not depressed. 

 38. Base of thorax not punctured ; elytra not reticulate. Middle States. 



14. spadiceus Dej. 

 |f Thorax not narrowed behind ; body oblong oval. 



38. Elytra feebly bronzed ; base of thorax punctured. Russian America, 

 Saskatchewan 15. fulvilabris Mann. 



Elytra not bronzed ; 



| Sides of thorax narrowly but distinctly depressed ; (basal foveas 



vaguely defined.) 

 34 -42. Hind angles slightly rounded; base finely punctured. Atlantic 



States, New Mexico 16 fa 11 ax Lee. 



30 -42. Hind angles not rounded ; base punctured ; (epipleurae always 



ferruginous. Canada, Minnesota, Winnipeg 17. pleuriticus Kirby. 



30 -42. Hind angles rounded ; base scarcely punctured ; epipleurae gene- 

 rally dark. Atlantic States, Canada, Kansas 18. herbivagus%. 



32 -36. Hind angles scarcely rounded ; basal foveas sparsely punctulate ; 

 knees blackish ; Russian America, Oregon 19. somnolentus Dej. 



%% Sides of thorax scarcely depressed ; base not punctured. 

 38. Hind angles rectangular ; not rounded. Kansas. 



20. v e n t r a 1 i s Lee. 

 fff Thorax narrowed in front; body nearly elliptical. 

 34. Sides of thorax feebly depressed ; elytra reticulate. Pennsylvania, 



Kansas, Ft. Simpson 21. opacipennis Hald. 



26 -30. Sides of thorax not depressed ; elytra not reticulate. Southern 

 and Western States, Kansas 22. n i ti d u lu s Chaud. 



** Feet piceous or black ; or at least thighs dark ; bead of prothorax 



not paler. 

 Thorax narrowed in front; intercoxal process of abdomen nearly 



smooth. 

 30. Body elliptical ; sides of thorax not depressed ; elytra of male not re- 

 ticulate. Kansas, Louisiana 23. ellipsis Lee. 



30 "44. Body longer oval ; sides of thorax feebly depressed. California, 



Oregon 24. cautus Dej. 



Thorax not narrowed in front; intercoxal process of abdomen punctulate ; 



| Head decidedly narrower than the thorax. 

 Thorax not very transverse ; base punctured ; 



[June, 



