HISTERID.E 277 



arcuate toward the sides, which are obtusely angulate near basal third, 

 the marginal stria fine; scutellum minute, subequilateral; elytra shorter 

 than wide and barely visibly longer than the prothorax, rather sparsely 

 and strongly, evenly and moderately coarsely punctate throughout, 

 with a smooth and feeble humeral swelling, around which externally 

 there is a distinct impression, this gradually becoming wholly obsolete at 

 about inner third of each elytron; discal striae nowhere visible; pygidium 

 strongly and rather closely but not densely punctate, the dividing ridge 

 sharp and evenly arcuate from side to side, the lower concave part 

 shining and coarsely, deeply punctate, the punctures as widely separated 

 and rather coarser than those of the anterior segment; mesosternal 

 projection obtuse; anterior and middle tibiae with an external even 

 comb of about ten short stout spines, those of the hind tibiae about seven 

 in number; abdomen strongly, loosely punctate, like the rest of the 

 surface, the segments behind the first extremely short and crowded 

 medially into a space only a third as long as the length of the lower con- 

 cave part of the pygidium. the first segment very large as usual. Length 

 2.75 mm.; width 1.65 mm. Texas (Brownsville), Wickham. 



I am uncertain whether or not this may be the species alluded 

 to by Mr. Schaeffer (J. N. Y. Ent. Soc., 1904, p. 202) as chalybcea 

 Horn, but pinguis, at any rate, is not chalybcea; it is much stouter 

 according to the drawing of Dr. Horn, and the lower part of the 

 pygidium in chalybcea is said to be piceous, less distinctly punctate 

 than the upper part and subopaque, all of which characters are 

 completely at variance with the corresponding ones of pinguis as 

 above described. 



Teretrius Erichs. 



As the species of Tetriosoma are more essentially tropical and 

 those of Teretrius generally subarctic in habitat, the greater number 

 of Teretrius species within our borders might be anticipated. I 

 have in my collection obliqulus and americanus Lee., montanus and 

 levatus Horn, and the two following, which seem to be undescribed 

 hitherto: 



Teretrius cylindrellus n. sp. Slender, rectilinearly cylindric and very 

 convex, polished, blackish-piceous, the under surface, legs and pygidium 

 rufous; head very evenly and moderately convex throughout to the 

 apex of the narrowed anterior part, finely, deeply and rather closely 

 punctate; prothorax a fourth wider than long, parallel, with feebly 

 arcuate sides from above, the latter slightly angulate near basal third, 

 viewed laterally, the stria strong, turning inward slightly at base; punc- 

 tures fine and rather close-set, gradually less so posteriorly; scutellum 

 very small, equilateral; elytra fully a third longer than wide and nearly 

 one-half longer than the prothorax, the parallel sides straight, rounding 



