206 Trans. Acad. Set. oj St. Louis. 



sinuato-truncate in the male. Length 2,7-3.2 mm.; width 0.65 mm. 



New York (Catskill Mts.), — H. H. Smith sniithi n. sp. 



Antennae slender toward base but rather strongly incrassate toward tip. 

 Form more elongate and slender than in smithi, shining, testaceous, 

 the head piceous, the abdomen black posteriorly; legs testaceous, the 

 antennae fuscous, paler basally; pubescence inconspicuous; head orbic- 

 ular, minutely, sparsely punctulate, the vertex very broadly impunctate 

 but scarcely impressed; antennae extending fully to the tips of the elytra 

 or further, very slender but rather rapidly and strongly incrassate dis- 

 tally, the tenth joint not quite as long as wide; prothorax only very 

 slightly wider than long, not wider than the head, the sides more broadly 

 rounded anteriorly and less converging thence to the base than in 

 smithi, the minute punctures granuliform and rather close-set basally, 

 finer and sparser anteriorly, the surface broadly concave along the 

 median line, a transversely arcuate series of larger punctures before the 

 base generally distinct; elytra nearly as long as wide, two -fifths wider 

 and longer than the prothorax, the sides parallel and broadly arcuate as 

 usual; humeri rather well exposed, the punctures as in smithi, fine, as- 

 perulate and sparse, almost wanting toward apex; hind tarsi nearly 

 as in smithi though still shorter; sixth ventral of the female broadly 

 rounded behind, the male not at hand. Length 2.65 mm.; width 0.53 mm. 

 Virginia. . . - gracillima Lee. 



3 — Species of the Atlantic regions. 4 



Species of the Sonoran fauna 11 



Species of the Pacific coast fauna 12 



4 — Vestiture abundant, more or less distinct and moderately pale but 



scarcely giving a pruinose effect on the at domen, the latter rather 



strongly shining 5 



Vestiture very dense, pale ashy, giving a strongly pruinose effect even on the 

 abdomen; legs and basal joint of the antennae pale honey-yellow, the 

 antennae fuscous, paler toward base 10 



5 — Legs piceous with the tarsi pale yellow, less minute in size, the prono- 



tum of the female not concave along the middle. Very slender, convex, 

 shining, blackish-piceous, the two basal ventrals paler and dark rufous, 

 the antennae fusco-rufous; vestiture moderately distinct; head sub- 

 orbicular, rather abruptly narrowed at base, finely closely punctulate, 

 the front broadly, feebly concave and subimpunctate; antennae not quite 

 extending to the tips of the elytra, rather slender, feebly incrassate dis- 

 tally, the second joint longer than the third, the tenth as long as wide in 

 the male, longer in the female; prothorax very nearly as long as wide, 

 distinctly wider than the head, the sides broadly rounded anteriorly, 

 thence very distinctly converging and nearly straight to the base, the 

 surface strongly convex, broadly, feebly flattened along the middle, 

 finely but closely, granularly and equally punctulate throughout in the 

 female, evenly convex but feebly, transversely impressed before the 

 base, with the punctulation finer, less dense and only distinctly granu- 

 lose toward base in the male, the intervals smooth in both sexes; elytra 

 about two-fifths wider and a third longer than the prothorax, the sides 

 parallel and arcuate, the punctures asperulate, minute and rather sparse, 

 the humeri narrowly exposed at base; hind tarsi slender, the basal joint 



