1851.] 



315 



presso, elytris rugosis, femoribus posticis dente parvo armatis, antennarum artic- 

 ulo 310 4'" fere Eequali. Long. '24. Pennsylvania. 

 Femina latet. 



28. D. f 1 a V i p e s, subeloni^ata, aenea, vel nigro aenea, capite subtoroso, 

 thorace minus dense rugose-punctato, postice angustato, angulis prominulis, pro- 

 funda canaliculato,tuberculo laterali pronninulo, ante basin valde impresso, elytris 

 parcius rugosis, femoribus posticis dente magno armatis, pedibus antennisque plus 

 minusve rufis, his breviusculis, articulo S'" 41" vix breviore. Long. -33. Mass. 

 Lake Superior and Pennsylvania. Kirby, 223 : Lac. 201. 



^. Thorax convexus : pedes breves crassi, femoribus posticis ellipticis, 

 basi nou attenuatis, subtus dente valido armatis. 



29. D. i u c u n d a, subelongata, cupreo-aenea nitida, thorace punctato, cor- 

 dato, angulis vix distinctis, tuberculis lateralibus obsoletis, profunda canaliculate 

 ante basin valde impresso, elytris profunde seriatim punctatis, vix rugosis, pedi- 

 bus antennisque rufis, his crassiusculis, articulo 3'' 4t" vix breviore. Long. 27. 

 Lake Superior. jLec. 237. 



30. D. K i r b y i, subelongata, cupreo-aenea, nitida, thorace parce-punctato, 

 cordato, angulis rotundatis, tuberculo laterali distincto parum prominulo, subtili- 

 ter canaliculato, ante basin valde impresso, elytris interstitiis planis vix rugosis, 

 ante medium impressis, pedibus antennisque rufis, his articulo 3'" 2ndo sesqui 

 longiore 4'" paulo breviore. Long. -28. Georgia. 



Variat tuberculo thoracis laterali minus distincto. Lac. 201. D. affinis|] 

 Kirby. 224. 



31. D. sulcicollis, brevis, thorace parce subtiliter punctato, cordato, 

 angulis paulo prominulis, tuberculo laterali paulo prominulo, canaliculato, ante 

 basin valde impresso, elytris profunde seriatim punctatis, vix rugosis, ante me- 

 dium obsolete impressis, pedibus antennisque rufis, his articulis 2"do et Sit" asquali- 

 bus, 410 vix brevioribus. Long. '33. Mass., Maine, Pennsylvania, Drs. Mel- 

 sheimer and Harris. 



Praecedente brevior, thorace latiore: mas femina paulo angustior; variat cuprea 

 viridis, et aenea, tuberculis thoracis saepe obsoletis. Lac. 186. D.metallica\\'&a.y. 

 J. Ac. 5,283. 



***Elytra parallela, vix truncata ; antennae articulo 2"'^ breviore, 

 thorax postice angustatus : oculi orbito praediti. 



32. D. f e m o r a 1 i s, minus elongata, aenea, pedibus rufis, vel fuscis, capite 

 toroso, thorace subtiliter rugoso: parce punctato, longiusculo, angulis prominulis, 

 vix canaliculato, ante basin impresso, lateribus subtuberculato, elytris convexis, 

 profunde seriatim punctatis, rugosis, antennis annulatis, articulis S'o 4toque 

 aequalibus, 2ndo sesqui breviore. Long. -26. Lake Superior. 



Mas subelongatusjfemor. posticis dente acuto armatis: femina femor. post, muti- 

 cis. D. c u p r e ae, et d i v i t i sectionis praecedentis similis, oculis tamen 

 orbito praeditis valde distincta. Kirby, 223 : Lac. 200. 



41 



