262 Journal New York Entomological Society. t^'o'- ^^• 



Elytra subparallel, widest near the middle and distinctly- 

 more deeply and coarsely punctate, abdomen black. 

 Second antennal joint ((^) very little if any wider 



than long punctatus. 



Second antennal joint ((^) rather strongly trans- 

 verse — 14 wider than long — elytral punctuation 



even coarser nigritus. 



Femora and tarsi pale rufous, tibiae dusky or blackish. 



marginicoUis var. claricollis. 

 Basal antennal joint of (^ with anterior dentiform prominence; 



femora red, tibiae and tarsi blackish, size very large dux. 



Prothorax rufous with a discal black spot of variable extent, sometimes 

 almost entirely black (spot wanting in nigriceps var. floridanus) . 

 Third antennal joint of J' similar to following joints. 

 Elytra blue or green. 



Elytra densely punctate and minutely tuberculate, opaque ; 

 basal joint of antennae ((^) triangular, appendix of 

 second joint short. 

 Antennae of J" moderately serrate, front and middle legs 



largely rufous in typical form marginicoUis. 



Antennae of ^ strongly serrate, legs black reflexus. 



Elytra shining, not evidently tuberculate. 



Basal joint of antennae ((^) subquadrate when viewed 

 from the front and above, appendage of second 

 joint long. 

 Antennae of (^ feebly serrate. 



Prothorax and legs black hirtellus. 



Prothorax margined with yellow, legs largely 



yellow var. lucens. 



Antennae of ^ strongly serrate discretus. 



Basal joint of antennae {^) subtriangular, a little longer 

 than wide, middle of sutural and lateral marginal beads 

 of elytra rufescent, appendix of second joint short. 



necopinus var. 



Basal joint of antennae {^) elongate triangular, elytral 



margins not rufescent at middle, appendix of second 



joint short stibtropicus. 



Elytra black with aeneous luster subceneus. 



Third antennal joint of (^ dilated, subquadrate and much wider than 

 the following joints when viewed from behind and above, .nigriceps. 



Prothorax entirely rufous var. floridanus. 



Prothorax rufous with two small black discal spots ; size large., .bipunctatus. 



