292 Journal New York Entomological Society, t^'oi- x>^n- 



Uniformly bluish or greenish, second and following intervals more or less 

 distinctly biseriately punctate; prothoracic process of male similar to 

 small male hecate, upper cephalic carina produced on each side into 

 a more or less distinct, acute tubercle, lower carina distinct. 



guatemalcnsis. 



7. Clypeus at apex truncate or rounded 8 



Clypeus at apex distinctly emarginatei 11 



8. Prothorax and elytra uniformly metallic green or coppery, shining; pro- 



thoracic protuberance in male prolonged on each side ; fully devel- 

 oped males have on each side of head a short acute elevation, k-ss 



developed males a short, oblique, elevated line orplieiis. 



Prothorax and elytra not uniformly metallic green or coppery 9 



9. Base of prothorax with a distinctly elevated, narrow margin. Prothorax 



metallic green or coppery, shining; elytra testaceous with suture and 

 some irregular spots green or blackish green ; underside black, with 

 metallic reflection. Male with two feeble tubercle-like elevation on 

 vertex and a short lobe-like prothoracic protuberance. .. .an"ronc;iJi'.y. 

 Base of prothorax without distinctly elevated narrow margin 10 



10. Prothorax shining, with aeneous or cupreous tint ; elytra uniformly piceous 



with feeble aeneous tint (janus) ; or piceous with base and sometimes 

 apex also more or less testaceous (stibstriatus). Fully developed males 

 with two elongate cephalic horns, prothorax broadly but feebly pro- 

 duced at middle janus. 



Prothorax and elytra dull, black or brownish black ; males without any 

 cephalic or prothoracic protuberance or horns pennsylvanicus. 



11. Prothorax at base margined with a narrow, elevated line 12 



Prothorax at base without narrow elevated line 13 



12. Prothorax and elytra cupreous, shining, male without cephalic or pro- 



thoracic protuberance cribricolUs. 



Prothorax black or brownish black, convex and declivous in front, elytra 

 testaceous with black spots ; head of male with a strongly produced 

 upper carina which at middle is prolonged into a narrow horn-like 

 prominence, lower carina absent uuclticornis. 



Prothorax and elytra uniformly black or bluish black ; head of male with- 

 out dislinct carinre or horns; prothorax of male produced at middle 

 into a short broad lobe, the lobe at apex rounded, slightly recurved 



and feebly emarginate at middle lecontei. 



13- Upper cephalic carina in male and female represented by two more or 

 less distinct tubercles, lower carina feeble or absent; prothorax alike 

 in both sexes ; prothorax and elytra brownish black, elytra generally 

 with pale spots tuberculifrons. 



Male without cephalic carina; or protuberance, female with the usual upper 

 and lower carina: ; prothorax of male produced at middle into a short, 

 broad, conical lobe, except in texauus 14 



1 Feebly emarginate in some specimens of nucliiconiis. 



