Tune, 1920.] XOTMAN : CoLF.OPTF.RA. X. Y. 191 



the head in tlie latter species is smaller, less transverse and the median 

 interocular convexity much hroader. 



Stenus edax new species. 



Form slislitly rolnist. Pubescence short cinereous, conspicuous only on 

 the abdomen. Head moderate in size, twice as wide as lonjj; interocular sur- 

 face two and two thirds times the width of an eye; ocular lines meeting at 

 about one lensith in advance, sulcations distinct, the intermediate convexity 

 narrower than the lateral portions, evenly convex : punctures moderately 

 coarse, evenly, closely distributed, somewhat polygonal, a small smooth spot 

 at the anterior end of the convexity; antenna? short not as long as the width 

 of the head, black throughout, the club composed of five joints, the ninth 

 narrower than the tenth which is as long as the last, the eighth large and dis- 

 tinctly trans\erse, the seventh slightly elongate and much thickened at apex ; 

 the funicular joints short, three to six decreasing rapidly in length, three 

 scarcely shorter than the next two. Palpi rather short, entirely black. Thorax 

 widest slightly before the middle where it is very slightly longer than wide and 

 about four fifths the width of the head ; disk somewhat flattened and the sides 

 compressed making a rather vague longitudinal ridge cither side, intervening 

 surface anteriorly and posteriorly very slightly concave, median canaliculation 

 very fine, scarcely impressed, extending from base to apical fifth ; punctures 

 close, coarse, even throughout, a more or less distinct whorl on the middle of 

 the disk. Elytra at base just perceptibly wider than the head, conjointly as 

 wide as long, the sides very slightly divergent and arcuate, the humeri very 

 prominent, the suture about a fifth longer than the thorax, the surface some- 

 what undulated, the punctures very close and strongly canaliculated, isolated 

 punctures not discernible; whorl entirely behind the middle. Abdomen slightly 

 narrower than the elytra at base, gradually and rapidly decreasing in width 

 posteriorly, evenly, rather coarsely and closely punctate throughout, punc- 

 tures slightly finer and sparser on the fifth segment. Transverse carinie tri- 

 cusped, the middle cusp long, subcarinate. Legs entirely black; fourth tarsal 

 joint simple, first joint of the posterior tarsi as long as the next three, as long 

 as the fifth. Length, 3.7 mm. ; width, i mm. 9. One speciiiu n. 



Male. Unknown. 



Female. Sixth ventral segment strongly rounded at apex. 



This species seems distinct from S. laccof>liiliis Csy. hy its an- 

 tennal structure, general proportions and rapidly narrowed ahdomen. 



Stenus perexilis new species. 



Form very slendi-r and parallel. Puluscence fine, short, cinereous, longer 

 and denser on the abdonun though not very conspicuous. Head large, twice 

 as wide as long, interocular surface slightly more than twice the width of the 

 eye, ocular lines meeting at two lengths in advance; sulcations very feeble, the 



