256 GEO. H. HORN, M. D. 



5. — Form elongate oval, more than twice as long as wide ; punctuation of head 

 well marked. 

 Piceous, surface geneous ; antennte externally and all tlie femora piceous. 



o. protciisa. y 

 Pale reddish brown, with slight ai-neous lustre; antennse and legs pale 



rufotestaceous 6. briiimesreiis. 



Form oval, not twice as long as wide 6. 



6. — Punctures of head distinct 7. 



Punctures of head small, indistinct 8. 



7. — Punctures of clypeo-frontal region dense and rugulose, subopaque. 



7. deiiticiilata. ~^ 

 Punctures of clypeo-frontal region coarse, well separated, surface shining. 



8. cribfi Irons. 

 8. — Punctures of elytral striae feebly impressed, nearly obsolete at apex. * 



9. |>iii$i;tiis. 



Punctures of strise well impressed and not obliterated at apex 9. 



9. — Thorax with distinct basal marginal line, without basal series of punctures ; 



surface scarcely alutaceous 10. ?e inula. 



Thorax with distinct basal marginal row of punctures, or with coarser punc- 

 tures than the discal close to the basal margin. 

 Head and thorax very opaque, the latter distinctly widest at base : inter- 

 vals scarcely wider than the strise 11. opacnla. 



Head and thorax less opaque, the latter widest at middle ; intervals wider 



than strise 12. ininnta. y 



10. — Thorax with an entire basal marginal line, which is not defined by punc- 

 tures 11- 



Thorax with a basal marginal row of punctures, sometimes continued to 



middle as a line 12. 



11. — Legs entirely piceous, surface very distinctly alutaceous and sul)uiia(iue. 



13. aintacea. 

 Legs more or less testaceous or brown, surface shining. 



Thorax alutaceous, with median smooth space posteriorly ; scutellar stria 

 usually confused ; color greenish bronze : tibia? in part and tarsi pice- . 



ous 14. subviridis. 



Thorax not distinctly alutaceous, without smooth space ; scutellar stria 

 regular; color golden bronze; tibise and tarsi testaceous. 



15. opnlenfa. 

 12.— Thorax extremely indistinctly punctate. 



Thorax indistinctly alutaceous, the basal marginal row of rather coarse 



distant punctures 16. obesula. 



Thorax alutaceous, basal punctures tine and close 17. ectypa. x 



Tiiorax finely and sparsely, but very distinctly punctate. 



Thorax shining, not alutaceous 18. pareepnncfata. 



Thorax alutaceous, subopaque 19. puli<'aria. 



Thorax with coarse, moderately deej) punctures, irregularly placed. 



20. crenulata. 



13. — Thorax arcuately nan-owed from base to apex 14. 



Thorax transversely quadrate, not narrowed, except at the oblique trunca- 

 tion 15. 



