236 Trans. Acad. Sci. of St. Louis. 



fclightly wider than the prothorax and less rounded at base, similarly 

 punctate, the antennae shorter and thicker, extending to the middle of 

 the elytra, more incrassate distally, the subapical joints evidently 

 transverse, the tenth somewhat longer than the ninth, the third longer 

 than the second as usual; prothorax of the usual form, fully as wide as 

 long, medially sulcate and impressed at the sides of the base as in 

 bilobata but with the surface at each side of the sulcus flatter, though 

 similarly densely granulose throughout the length, the granules gradu- 

 ally smaller and feebler anteriorly; scutellum acutely and somewhat 

 closely granose, the granules not parted along the middle but tending 

 to form irregular longitudinal lines throughout; elytra smaller than in 

 bilobata but similarly sculptured, about three -fourths wider and a third 

 longer than the prothorax; abdomen nearly as in bilobata; intermeso- 

 coxal parts less punctate. Length 3.0-3.5 mm.; width 0.75 mm, Canada 

 (Ottawa), — W. H. Harrington canadensis n. sp. 



Form nearly similar to canadensis, polished piceous-black throughout, the 

 legs pale red-brown, the antennae dusky, paler toward base; vestiture 

 fine, not very conspicuous; head rather large and about as wide as the 

 prothorax in the male, decidedly smaller and not as wide as the latter 

 in the female, broadly arcuato- truncate at base, the angles broadly 

 rounded, the punctures very minute and sparse ; antennae longer and 

 more slender than in canadensis, nearly as in bilobata, the subapical 

 joints fully as long as wide to a little longer; prothorax as long as wide, 

 of the usual form, the sides abruptly and strongly converging and sin- 

 uate posteriorly to the base, the sulcus deep as usual, the granules 

 nearly as in bilobata, except that they grow rapidly finer and sparser 

 exteriorly and aplcally; scutellum granulose, the granules not parted 

 along the middle; elytra and abdomen as in the two preceding species. 

 Length 2.8-3.1 mm.; width 0.7 mm. Iowa to New Jersey. 



nigrescens u. sp. 



7 Body much smaller in size than in the preceding species, stout, moder- 

 ately convex, polished, pale rufo-testaceous, the head and abdomen 

 slightly darker, the legs and antennae pale throughout; pubescence in- 

 conspicuous; head large, wider than long, parallel and straight at the 

 sides, rectilinearly truncate at base, the angles rather narrowly round- 

 ed; eyes moderate in size; surface not impressed, minutely, sparsely 

 punctulate, the antennae shorter than in the preceding section, stout, 

 extending to about basal third of the elytra, moderately incrassate 

 distally, the subapical joints distinctly transverse, the second and third 

 equal; prothorax fully as wide as long, much narrower than the head, 

 the sides prominently rounded anteriorly, thence not abruptly but 

 strongly convergent and straight to the base, not sinuate as in the pre- 

 ceding section; surface very minutely, sparsely punctulate, more strongly 

 and closely on the convexity at each side of the deep median sulcus, hav- 

 ing also a small fovea at each side near the base ; scutellum flat, sparsely, 

 granose, the granules widely parted along the middle; elytra three - 

 fourths wider and about a third longer than the prothorax, very sparsely,, 

 almost invisibly punctulate, more evidently and subgranularly toward 

 the scutellum, the humeri widely and obliquely exposed, the suture 

 impressed narrowly and deeply behind the scutellum, the sides more 



