AMERICAN COLEOPTERA. 167 



Infra-orbital ridge well marked. Antennae slender, nearly as long as head and 

 thorax, third joint twice as long as the second, last slightly obliquely truncate. 

 Thorax quadrangular slightly longer than wide, sides nearly parallel, slightly 

 arcuate in front, base bi'oadly arcuate, a discal series of two punctures one at 

 the apical margin, another posterior to it and rather distant, surface smooth, 

 shining. Scutellum smooth. Elytra slightly wider than the thorax, conjointly 

 longer than wide, sutural stria vaguely impressed and with three or four vague 

 punctures, a median discal series of five or six and numerous, densely placed 

 punctures on the deflexed portion of the lateral margin, surface shining. 

 Abdomen moderately coarsely and densely punctured, sparsely pubescent, 

 beneath as above. Femora punctulate, tibiae spinulose, tarsi glabrous above. 

 Length .44 inch; 11 mm. 



The sixth ventral of the male is broadly eiuarginate. The anterior 

 tarsi are dilated in both sexes but more so in the male. 



Color black shining, legs piceous, tarsi usually paler. Abdomen 

 iridescent. 



Post coxal process short and broad, translucent. 



Occurs from Massachusetts to Canada, Florida and Louisiana. 



Q. veriiix Lee. Proc. Am. Phil. Soc. 1878, p. 389.— Head oval, slightly 

 longer than wide, moderately constricted behind, surface smooth, shining, and 

 with a small puncture at the base of the antennae, one at the margin of the 

 eye in front, another more posterior, one behind the eye and numerous small 

 punctures at the side of the head beneath. Labrum entire, arcuate in front. 

 Eyes oval, slightly oblique, subtruncate in front. Infra-orbital ridge well 

 marked. Antennae slender, attaining the middle of the thorax, second joint 

 shorter than the third, last joint obliquely truncate. Thorax relatively large, 

 broader than long, narrower in front, sides moderately, base more arcuate, 

 surface smooth, shining, anteriorly two discal punctures on each side, another 

 near the side in front, marginal punctures small. Scutellum smooth. Elytra 

 as wide as the thorax, conjointly a little wider than long, a deep sutural stria 

 with one puncture near the scutellum, a discal series of four or five punctures, 

 deflexed portion of elytra rather densely punctured. Abdomen very sparsely 

 punctate and sparsely pubescent, beneath as above. Femora punctulate, tibiae 

 spinulose externally, tarsi glabrous above. Length .48 inch ; 12 mm. 



The sixth ventral of the male is merely truncate, in female arcuate; 

 the anterior tarsi in both feebly dilated. 



The post coxal process is short, triangular and corneous. 



The color is black highly polished, the abdomen iridescent. 



Occurs in Massachusetts, Canada, Illinois, Michigan, but rare. 



I have repeated this description to make it correspond in scope with 

 the others in the paper. In the original description Dr. Leconte says 

 there is but one discal thoracic puncture, but by the Erichson method 

 of numeration there are two by counting the one at the apical margin, 

 the fact being the same, but merely otherwise described. 



