216 Trans. Acad. Sci. of St. Louis. 



5 — Form slender, convex, rather shining, the elytra and abdomen dull in 

 lustre, piceous-black, the head, prothorax and entire antennae dusky 

 testaceous, the legs paler, flavo-testaceous throughout; head large, the 

 eyes moderately developed, the sides behind them very feebly converg- 

 ing and nearly straight for a long distance, then broadly rounded into 

 the broadly subtruncate base; front not impressed; prothorax large, 

 elongate-suboval, three-fourths as wide as the head and of the usual 

 form; elytra small, very finely but densely, asperately punctate, 

 parallel, slightly longer than wide, much narrower than the head, 

 scarcely visibly wider than the prothorax and equal in length to the 

 latter; abdomen at base very nearly as wide as the elytra, rapidly 

 broadening posteriorly, and, at the apex of the fourth segment, much 

 wider than the elytra and as wide as the head. Male with sexual mod- 

 ifications nearly similar to those of elaborate/, but differing in having the 

 medial tooth of the impression of the fourth ventral more anterior in 

 position and somewhat distant from the transversely rectilinear apical 

 edge of the depression and in having the broad shallow impression of 

 the fifth ventral transversely oblong with parallel and much straighter 

 sides, the apex along the impression broadly and triangularly emarginate 

 throughout the width of the latter; subtriangular sinus of the sixth 

 segment larger, but little more than twice as wide as deep. Length 

 3.5-3.8 mm.; width 0.6-0.65 mm. New York (Long Island) and North 

 Carolina ( Asheville) ventralis n. sp. 



Form rather less slender but otherwise nearly similar throughout to 

 ventralis, the coloration similar; head relatively smaller though more 

 elongate, rather longer than wide, the base evenly, semicircularly 

 rounded throughout, becoming parallel for a short distance behind the 

 eyes; prothorax large, nearly five -sixths as wide as the head, longer 

 than wide, strongly rounded at the sides; elytra relatively larger than in 

 ventralis, but little narrower than the head and slightly wider than the 

 prothorax, equal in length to the latter, longer than wide, parallel, 

 minutely, densely and asperately punctate; abdomen at base but little 

 narrower than the elytra, moderately broadening posteriorly, at the 

 apex of the fourth segment rather wider than the head. Male having 

 sexual characters similar in general to those of ventralis, the teeth at 

 the sides of the apex of the impression of the fourth ventral much 

 smaller and not at all conspicuous, the medial tooth more elongate but 

 not very much more posterior in position, the impression of the fifth 

 segment nearly similar in form and extent but with its posterior margin 

 feebly and subcircularly sinuate toward the middle, the sinus of the 

 sixth ventral nearly similar but rather smaller and shallower, the sur- 

 face feebly and biobliquely impressed. Length 3.9 mm. ; width 0.68 mm. 

 Ohio (Cincinnati), — Mr. Charles Dury duryi n. sp. 



The coloration of the legs in opaca — which was originally 

 described as an Echiaster, — is inconstant, some specimens hav- 

 ing them a uniform clear honey-yellow throughout, while 

 others have the tibiae almost piceous-black and the tarsi but 



