132 AMERICAN COLEOPTERA. 



Middle and hind tihire of '^ muoronate; elytral intervals flat or nearly so. 

 First joint of antennse jiale ; tihisE and base of femora rufous. 



37. seiieipeiiiie. 

 Antenna; and lefis entirely dark. 



Vestiture ratlier dense, squaniifonu. 38. inipe.viiiii. 



Vestiture not dense, hair-like. 



Body less robust; prothorax much wider than long 39. nietsilli<'iiiii. 



Body more robust; prothorax veiy little wider than long. 40. troj^lody te$$. 



4. Beak short, stout. 10. 



Beak more slender — at least moderately long. 5. 



5. Front narrower than the tip of the beak. 9. 



Front not narrower, usually obviously wider than the tij) of the beak. 



AnteniiiE inserted very near the base of the beak, first joint nearly or quite 

 reaching the eye. 

 Vestiture abundant, subsquamiform ; beak slender. 



Elytra scarcely one-third longer than wide. ..41. propinqiiicoriie 



Elytra about one-half longer than wide. 42. iiiodestiiin. 



Vestiture finer, sparser; beak stouter. 



Surface with reddish bronze lustre ; prothorax rather sparsely punctate. 



43. Mubtiiictiiiii. 

 Surface black, sometimes slightly seneous; pi-othorax moderately, closely 



punctured 44. perviea."K. 



Antennse less basal, first joint not reaching the eye. 



Head beneath as usual ; tibial armature well developed 6. 



Head excavated and polished beneath: tibial armature feeble, 45. gulare. 

 (i. Tibial mucro with a more or less conspicuous denticle on the under side. 

 First joint of antenna; longer than the next two; tibial mucro long. 



46. proclive. 

 First joint of antenna; shorter than the next two; tibial nnicro short. 



47. ciiiipai'osse. 



First joint of antennse. barely as long as the next two; intervals of elytra 



more or less convex. 



Tibial mucro moderately long with an acute denticle beneath ; beak and 



abdomen more coarsely punctate ; first antennal joint nearly reaching 



the eye. 48. gro$«siiluiii. 



Tibial mucro shorter; denticle less acute, subapical ; beak and abdomen 

 less coarsely punctate; second antennal joint reaching the eye. 



49. patrtiele. 

 Tibial mucro simple, or at most subangulate beneath. 

 Form elongate, wider behind ; beak parallel, feebly arcuate, much longer in 

 the 9; third joint of antennje reaching the eye (9); body beneath 



more sparsely punctate than usual. 50. walMllii. 



Form moderately stout; second joint of antenna' usually reaching the eye 

 in both sexes; punctuation beneath closei'. 



First joint of antennte subequal to the next two 7. 



First joint of anteunge obviously shorter than the next two, at least in the "J, . 

 Tibial mucro short, more or less subangulate beneath. 



Elytral intervals very little wider than the striae ; body ventricose. 



51. abilomiiiale. 

 Elytral intervals wider : body oblong 52. perforicolle. 



