120 MEMOIRS ON THE COLEOPTERA 



the third joint longer than wide and longer than the succeeding joints; 

 club loose, not very stout, about as long as the four preceding joints, the 

 ninth joint longer than wide and obconic; prothorax one-half wider than 

 long, the sides feebly converging, feebly undulated and broadly, evenly 

 arcuate from apex to base; surface even, sculptured like the head, having 

 near each side a very fine carinule, which is obsolete at apex and disappears 

 basally; scutellum obtuse, twice as wide as long; elytra two-thirds longer 

 than wide, very slightly wider than the prothorax, obtusely parabolic in 

 about apical third, where they are very slightly wider than at base; surface 

 with close-set rows of distinct punctures, the third and fifth evidently ac- 

 companied by feeble carinules; smooth basal plate broadly angulate at the 

 base of the third stria; first abdominal segment as long as the next two, 

 the others subequal in length; coxae all widely separated, the legs small. 

 Length 1.5 mm.; width 0.55 mm. Michigan (Detroit), Schwarz. A 

 single example. 



Larger and broader than vernalis, with larger eyes, still more 

 markedly dentate hind angles of the prothorax and larger and more 

 conspicuous elytral punctures, the general surface of the elytra 

 less shining and with closer pubescence. 



Lathropus robustulus n. sp. Short, convex, much broader than any 

 other species, opaque, pale brown in color, the minute pubescence rather 

 abundant; head smaller, scarcely more than two-thirds as wide as the 

 prothorax, densely micro-reticulate as usual, the elongate fine granules 

 ruguliform; epistomal suture obsolete, though traceable as in the pre- 

 ceding by oblique illumination; eyes large, at less than half their length 

 from the base, much larger than in striatns, similarly micro-setulose and 

 minutely faceted; antennae still more slender, but little longer than the 

 head, the second joint much longer and barely narrower than the first, 

 nearly as long as the next three, third to eighth forming a slender funicle, 

 the third obconic, slightly longer than wide, four to eight equal, small, 

 close and wider than long; club loose, about as long as the preceding 

 five joints; prothorax one-half wider than long, widest before the middle, 

 apparently somewhat wider at base than at apex, the sides distinctly 

 arcuate, nearly even, the undulations subobsolete, the basal angles only 

 minutely acute; surface sculptured like the head, the sublateral carinule 

 almost entire but extremely fine and somewhat disintegrated; scutellum 

 very short, transverse; elytra scarcely one-half longer than wide, evi- 

 dently wider than the prothorax, the parallel sides broadly arcuate; 

 apex subcircularly rounded; basal plate bisinuate posteriorly; surface 

 with rather groove-like series of relatively strong and close-set punctures, 

 the two dorsal carinules feeble; basal segment of the abdomen rather 

 longer than the next two, the remaining segments just visibly decreasing 

 in length; legs very short. Length 1.3 mm.; width 0.4 mm. A single 

 specimen, taken by Mr. Schwarz at Columbus, Texas. 



The sculpture is coarser than in pictus Schz., from Florida, the 

 size larger and the outline very much broader; it is much more 



