312 [November, 



tundatim truncatis, antennarum articulo 3'o 2"''" plus sesqui longiore, femoribus 

 posticis modice clavatis. Long. -31 '37. Saratoga, Catskill. 



Mas, femor. post, dente lamellato armatis, alteroque minutissime remote. 

 Femina fetnor. post, dente lamellato armatis. Lac. 113. 



10. D. tuberculata, asneo-cuprea, thorace dense alutaceo-rugoso, postice 

 subangustato, angulis anticis prominulis, canaliculato, lateribus antice valde tuber- 

 culatis, el3'tris valde rugosis, apice vix truncatis, antennarum articulo 3'^ 2"fl<' 

 sesqui longiore, femoribus posticis valde incrassatis,fuscis,basi rufis. Long. -24 

 -30. Penn. Dr.Melsheimer. 



Mas, femor. post, dente acuto, alteroque minute remote armatis. Femina, 

 brevier, crassior, femor. post, non dentatis. Lac. 155. 



C. Longiusculae, elytris versus apicem mfigis subito attenuatis, thorace 

 valde punctato, antcnnis minus attenuatis, articulo 3' 2""^ paulo 

 longiore. 



11. D. pulchella, testacea, auree-viridimicans, thorace quadrate, dense 

 ubtiliter rugoso, angulis prominulis, canaliculato, margine basali subreflexo, 

 disco versus latera vix impresso; elytris profunde striato-punctatis, rugosis, 

 antennarum articulis 2iido et 3i" subelongatis, hoc paulo longiore, femoribus pos- 

 ticis modice incrassatis. Long. -35. New Jersey. 



Mas latet. Femina femor. post, dente acuto armatis. 



Habitus omnino D. palmatae, differt tamen thorace rugose, antennarum 

 articulo 3" minus elongate, denteque femorali non lamellato. 



12. D. subtil is, depressa, elengata, aenea, thorace dense rugose punctate, 

 quadrate, lengiusculo, postice vix angustato, angulis prominulis, plus minusve 

 canaliculato, lateribus fere rectis, vix impressis, elytris triimpressis, interstitiis 

 planis, transversim dense rugosis. antennarum articulo 3' 2ndo sesqui longiore, 

 femoribus posticis minus elengatis, magis clavatis, subtus dente acute armatis. 

 Long. -27 -38. New York, and Pennsylvania. 



Variat cupree-aenea; varlat quoque elytris non impressis. Specimina minora 

 thorace profundius impresso gaudent. Kunze, (Nov. Act. Halens. 2,4,12:) 

 Lac. 147. -D. ceiiea Ahrens. Nov. Act. Hal. 1, 3, 21. Z>. quadricollis Say. 

 J. Ac. 5. 282. 



13. D. c o n f 1 u c n s, depressa, elongata, aenea, thorace quadrate, lengius- 

 culo, postice subangustato, dense rugose punctato, angulis prominulis, medio 

 ante basin impresso, lateribus, subsinuatis, tuberculo depresso paulo prominulo: 

 elytris antennis pedibusque sicut in D. s u b t i I i. Long. 32. Pennsylvania. 



A praecedente tuberculis thoracis minus obliteratis, thoraceque nen canalicu- 

 lato, et postice impresso solum differt. Forte varietas mera haberi debetur. 

 D. confiuenta. Say, J. Ac. 5, 293. Lac. 199. 



14. D. f u 1 g e n s, depressa, laete aurea, thorace quadrato, postice non angus- 

 tato, cenfertim rugose-punctate, angulis posticis nen prominulis, lateribus rectisj 

 vix impressis, elytris versus suturam obsolete biimpressis antennis pedibusque 

 sicut in D. s u b t i 1 i. Long. '32. Lake Superior. 



D. s u b t i I i, paulo latior, et thorace non canaliculate differt. |Lec. 236. 



15. D. p r e s i c o 1 1 i s, valde elongata, cupree-aenea, antennis pedibusque 

 rufis, thorace subtiliter alutaceo, sat dense punctato, quadrate, angulis prominulis 

 subconaliculate, lateribus rectis, elytris interstitiis planis, transversim dense 



