34 Journal New York Entomological Society. [Voi. iv. 



5. Larger (8-10 mm), elytral strite distinctly punctured, prothorax punctured from 



side to side at base avida. 



Smaller (6 mm.), elytral striae nearly smooth, thorax not punctured at base. 



arenaria. 



6. Thorax sinuate on the sides near base, hind angles rectangular or prominent. .7 

 Thorax not sinuate on sides near base, hind angles obtuse 9 



7. Elytra more parallel, more than three times as long as the prothorax. 



rufimanus. 



Elytra more rounded on sides, less shining, less than three times as long as pro. 



thorax 8 



8. Sides of prothorax more rounded, more suddenly sinuate at base, hind angles 



rectangular, prominent laticollis. 



Sides of prothorax less rounded, less suddenly sinuate at base, hind angles rect- 

 angular, not prominent carinata. 



9. Thorax nearly quadrate, elytral striae fine, finely punctate anteriorly, .elongata. 

 Thorax broader than long, elytral strialion less fine, punctuation quite evident. 10 



10. Blackish piceous, elytral striae more finely punctate . . .hyperborea. 



Blackish, elytra brown, striae more strongly punctate brunnipennis. 



1 1. Prosternum with side pieces smooth 12 



Prosternum with side pieces punctured, scutellar stria long apricaria. 



12. Prosternum ^ not punctured septentrionalis. 



Prosternum ^ with oval punctured space 13 



13. Scutellar stria short or wanting, meso- and metasternal side-pieces punctured. 



exarata. 

 Scutellar stria long, meso- and metasternal side-pieces smooth latior. 



14. Posterior tibiae of $ densely pilose internally 15 



Posterior tibiae of ^ not or scarcely pilose internally 23 



15. Spur of anterior tibia trifid 16 



Spur of anterior tibia simple 17 



16. Hind angles of thorax obtuse, four antennal joints largely pale. . . .angustata. 

 Hind angles of thorax sharp, rectangular, only three basal antennal joints 



pale pallipes. 



17. Antenna not carinate, prosternum of ^ not punctured 18 



Antennje with joints 2-3 carinate 21 



18. Scutellar stria terminating in an ocellate puncture impuncticollis. 



Scutellar stria without ocellate puncture 19 



19. Striae of elytra punctured, base of thorax finely punctured basillaris. 



Striae of elytra not or obsoletely punctured, base of thorax smooth 20 



20 Thorax narrowing from base to apex, form broad, robust, terminal spur of ante- 

 rior tibia shorter than usual crassispina. 



Thorax narrowing from in front of base, form oblong-oval, tibial spur normal, 

 legs piceo-rufous, hind angles of thorax obtuse, the puncture rather distant 

 from side margin cupreolata. 



21. Scutellar stria with ocellate puncture fallax. 



Scutellar stria without ocellate puncture 22 



22. Basal impressions of thorax very faint, striae of elytra and surface of thorax not 



punctured, form oblong oval protensa. 



