H. C. FALL. 147 



all in the female. LnportuuKin, turhnlentnni and pervicax resemble 

 one another so closely as to require considerable care in their separa- 

 tion. The very feebly mucronate male tibiae easily separates ^)e>'t'i- 

 ca.v when that sex is at hand, and it is believed that the tabular 

 differences, supplemented by a careful reading of the descriptions, 

 will enable the student to distinguish the two first named species 

 with reasonable certainty. It is probable that importunwn and 

 pervicax are confined to the extreme southeast Florida and adjacent 

 region, and the fact that in the large material examined no speci- 

 men of tarbidentum appears from south of the Potomac in the 

 Atlantic Coast region, is prima facie evidence that the latter species 

 may, with confidence, be separated simply by its locality label. 



.58. A. gi'iweiiiil Smith. — Form moderate, black, often more or less aeneou.s ; 

 piibesceuce conspicuous. Beak ( 'J, ) as long or a little longer than the head and 

 prothorax, noticeably attenuate ; apex slightly broader ; basal dilatation feeble, 

 punctate and with rather coarse, more or less bristling pubescence in basal two- 

 thirds; tip glabrous, shining; (9) very little longer than in the male, a little 

 more slender, dull, glabrous and more finely punctate. First antennal joint as 

 long as the two or three following, and nearly or quite reaching the eye, second 

 and third subequal, the latter nsually as long as the fourth and fifth together; 

 eyes prominent ; front sulcate or not. Prothorax wider than long; sides diver- 

 gent to the base; apical constriction strong or moderate; ba.sal margin expanded ; 

 surface uniformly, closely, not coarsely punctate ; basal fovea present. Elytra 

 about one-third longer than wide; liumeri moderate; sides subparallel in basal 

 three-iifths; intervals wide, flat or slightly convex. Punctuation beneath 

 moderately strong and close but not dense. Length 1 7-2.1 mm. ; .07-.085 inch. 



% . Sutural angles rounded ; middle and hind tibise armed with a moderately 

 long simple mui-ro. 



9. Sutural angles not rounded; tibiae unarmed. 



Occurs from New York to Florida, and westward to Colorado 

 and Arizona. 



A common and wide-spread species, exhibiting, as might be 

 expected, considerable variation. The basal antennal joints are 

 especially inconstant in their relative lengths. The pubescence 

 varies in color from grayish to yellowish cinereous, and becomes 

 coarser in the Arizona examples. As a rule, the eastern specimens 

 are more noticeably teneous. Fraterimin Smith was founded on 

 such specimens, in which naturally, or from abrasion, the pubes- 

 cence was less conspicuous. From wquabile, which it most closely 

 resembles, (/rheum is distinguished by the antennte being inserted 

 nearer the ba.se, the relatively longer first and third joints, and by 

 the larger prothorax, with the sides posteriorly more divergent, as 

 well as by the charactei's given in the table. This species is said by 



TRANS. AM. ENT. SOC. XXV. OCTOBER. 1898. 



