54 MEMOIRS ON THE COLEOPTERA 



but in addition with many rather closely placed coarsish punctures, 

 which are larger than in the preceding group 7 



2 Elytra gradually narrowed and with less arcuate sides from about 

 basal third to the apex, which is notably acute 3 



Elytra more rapidly narrowed and more arcuate at the sides posteriorly 

 only from about the middle, more obtusely ogival at apex 4 



3 Punctures of the abdomen only visible toward the middle basally, 

 few in number and very feebly defined, the fine ground sculpture 

 very dense. Form more briefly oval, convex, piceous-black, scarcely 

 paler beneath, the dense vestiture almost uniformly dark ashy, 

 scarcely at all variegated; prothorax two and one-half times as wide 

 as long, the moderately converging sides straight; punctures minute, 

 close-set and rather deep, the interspaces polished, the median line 

 feebly striiform only centrally; elytra shorter than usual, barely 

 visibly longer than wide, the strongly and evenly rounded sides 

 gradually less arcuate posteriorly to the acute apex, the surface not 

 notably convex at base to the level of the pronotum, irregularly and 

 finely, rather sparsely and perforately punctate, the minuter hairs 

 not borne from evident punctures. Length 1.2 mm. ; width 0.65 mm. 

 Texas (Columbus) pulvereus n. sp. 



Punctures of the abdomen small but more numerous and more visible, 

 the ground sculpture less deep and dense, with the surface a little 

 more shining medially. Form more elongate-oval, still more grad- 

 ually narrowed behind to the very acute apex, blackish, the under 

 surface slightly, the legs much, paler, rather more shining than usual, 

 the erect hairs somewhat more numerous and the decumbent 

 apparently a little longer; prothorax relatively less transverse than 

 in pulvereus, the sides more strongly converging from base to apex, 

 nearly straight, the minute punctulation rather finer and feebler 

 and not quite so close-set; elytra nearly a fourth longer than wide, 

 the rounded sides very gradually converging posteriorly to the still 

 more notably acute apex, the scattered punctures rather numerous 

 but widely spaced and distinctly more minute than in the preceding, 

 the interspaces smooth and shining, the extremely minute scars left 

 by the shorter hairs almost invisible. Length 1.3-1.35 mm.; 

 width 0.65-0.73 mm. Georgia to Louisiana. [Limnichus ovatus 

 Lee., Proc. Acad. Phila., 1854, p. 117] ovatus Lee. 



4 Pubescence very short, rather finer and not so dense, allowing the 

 integuments to shine distinctly through the vestiture 5 



Pubescence less abbreviated and very dense, so that when intact the 

 upper surface is densely dull, the integuments well covered 6 



5 Form not very broadly oval, convex, pale castaneous, still paler 

 beneath, the short vestiture extremely short, not dense, yellowish, 

 the longer and more erect hairs not numerous, the few rather irregular 

 longitudinal series of stiffer and more erect hairs difficult to see; 

 prothorax two and one-half times as wide as long, the converging 

 sides straight, the surface not evidently impressed medially, the 

 punctures very minute, feeble and well separated; scutellum evi- 

 dently longer than wide, acutely triangular; elytra scarcely a fourth 

 longer than wide, not evenly oval, the sides parallel and moderately 



