AMERICAN COLEOPTKRA. 281 



Clypeus rather broadly reflexed : anteunal club in the female shorter than 

 the funicle: hind angles of the thorax distinct; sculpture of upper 

 surface finer testacea. 



Clypeus narrowly reflexed ; antennal club in the female as long as the 

 funicle; bind angles of the thorax very obtuse; surface sculpture 



coarser pallens. 



Prevailing color dark; the elytra in fully colored specimens more or less 

 brilliant green or bronze, frequently with narrow pale limb 5. 



5. Sexes similarly colored 6. 



Head, thorax and body beneath black or piceous in the male, rufous in the 

 female; clypeal suture distinctly impressed. 



Elytra fiuely and densely transversely wrinkled, the punctuation indis- 

 tinct; basal marginal line of thorax nearly obliterated at middle; 

 hind angles of thorax less marked crotchii. 



Elytra less densely transversely rugose, the punctuation coarser and dis- 

 tinct; basal marginal line of thorax more evident; the hind angles 

 more prominent fulgi«la. 



6. Sides of thorax sinuate posteriorly, the hind angles prominent. 



Clypeal suture unimpressed, often indistinct; surface lustre green, legs in 

 great part pale. 



Clypeus narrowly reflexed, front tibiae tridentate eloiigala. 



Clypeus more broadly reflexed, front tibiae sub-bidentate caiiatleiisi**. 

 Clypeal suture deeply impressed ; surface lustre bronze ; legs variable. 



f'liscnla. 

 Sides of thorax feebly sinuate posteriorly, the angles distinct but obtuse; 

 head, especially in the female, relatively smaller and narrower than 

 in allies; elytra brilliant green, usually without pale limb; append- 

 ages normally blackish throughout backii. 



Sides of thorax not sinuate posteriorly ; species small (California). 



Hind angles of thorax distinct but obtuse vaga. 



Hind angles of thorax rounded and indistinct. 



Clypeus more broadly reflexed ; elytra green, sutural angles prominent. 



naua. 

 Clypeus more narrowly reflexed ; elytra bronzed, sutural angles not promi- 

 nent muscula. 



7. Size small; prothorax feebly sparsely punctate; spurs of hind tibi* acute, 



unequal in length, but otherwise nearly similar, and not difleriug in 



the sexes piisilla. 



Size larger ; prothorax coarsely but evenly punctured ; spurs of hind tibiae in 

 the male nearly equal in length, but mutually more or less dissimilar 

 and truncate or obtuse at tip 3. 



8. Outer spur of hind tibiae in the male very much wider than the inner and 



distinctly contorted. 



Elytra with distinct greenish lustre albicollis. 



Elytra testaceous, with piceous lateral vitta lateralis. 



Outer spur of hind tibia in the male distinctly wider than the inner, but less 



strongly so, and scarcely contorted 9. 



9. Elytra testaceous, with piceous lateral vitta, the later sometimes wanting or 



visible only at the apical umhone decolorata. 



TRANS. AM. ENT. SOC, XXVII. (36) AUG., 1901. 



