schaeffer: donaciini of the new world. 6 1 
3. Prothorax pubescent 4. 
Prothorax not pubescent, shining and moderately coarsely 
punctate vicina Lac. 
4. Head, prothorax and elytra pubescent pubescens Lee. 
Head and prothorax pubescent, elytra smooth hirticollis Kby. 
5. Prothorax not pubescent; elytra less than twice as long as 
wide at base 6. 
Prothorax pubescent ; elytra more than twice as long as wide 
at base, apices rounded pubicollis Suffr. 
6. Prostemal side pieces entirely pubescent militaris Lac. 
Prostemal side pieces pubescent near anterior coxae for about 
half or less of their width 7. 
7. Prothorax moderately coarsely punctate, shining, posterior 
femora relatively strongly clavate, at base much narrower 
than at apex • 8. 
Prothorax finely punctate or finely rugose, more or less 
dull 9- 
8. Elytra on the disk smooth, shining assimilis Lac. 
Elytra moderately coarsely rugose from base to apex rugosa Lee. 
9. Lateral tubercle of prothorax distinct and separated from 
disk by an arcuate impression 10. 
Lateral tubercle absent; elytra shining, intervals not rugose; 
posterior femora scarcely clavate, rather narrow and 
elongate edentata Schflfr. 
10. Prothorax densely and finely rugose; elytra coarsely and 
rather densely rugose; posterior femora robust but feebly 
clavate and at base and apex of equal width; prothorax at 
sides below vermiculate-rugose dissimilis n. sp. 
Prothorax finely alutaceous with a few small punctures on the 
disk; elytra generally feebly rugose on the disk but more 
strongly at sides and apex; posterior femora strongly 
clavate, at base narrower than at apex; prothorax at sides 
below finely strigate-rugose rufa Say. 
1 1 . Posterior femora armed below with one tooth and behind this 
an oblique serrate ridge,' which latter is often reduced to 
one or more denticles 12. 
Posterior femora below with one tooth but without an oblique 
ridge or denticles behind 13. 
12. Outer apical angle of elytra not distinct, broadly rounded; 
anterior transverse impression of prothorax generally 
distinct ' proxima Kby. 
Outer apical angle of elytra distinct, but feebly rounded; 
anterior transverse impression of prothorax generally 
absent cincticornis Newm. 
13. Posterior femora bicolored or entirely rufous 14. 
Posterior femora uniformly metallic . 27. 
14. Posterior femora long, reaching the apex of the third ventral 
segment or longer 15. 
' Seen more plainly from an internal view. 
5 
