Coleopterological Notices, IV. 521 



visibly longer than wide, about one-third longer than the prothorax, and, at 

 the sTnal) and slightly prominent humeri, but little wider than the latter ; 

 sides distinctly convergent, the apex parabolic ; disk very finely striate, the 

 strife deep, abrupt, impunctate, the intervals flat, alternating slightly in 

 width, four or five times as wide as the strise, finely, deeply, closely and con- 

 fusedly punctured throughout but not rugose. Abdomen finely, rather densely 

 punctate. Prosternum widely separating the coxse, the latter not quite as 

 small as usual. Length 4.7 mm. ; width 2.25 mm. 



New Mexico ; Colorado. 



The type is probably a male, the middle of the abdomen near the 

 base being very feebly impressed, and abruptly more coarsely and 

 very sparsely punctured. 



This exceedingly isolated species may be known at once by its 

 very finely and densely punctured integuments, rather large size, 

 feebly rhomboidal form, large prothorax and short conical elytra. 

 As is frequently the case in this genus, the prothorax in some 

 specimens becomes feebly inflated, especially toward apex, a form 

 which is however constant and distinctive in some species. 



5 Onychobaris aiistera n. sp. — Moderately robust, rhomboid-oval 

 not very convex, black throughout, very densely sculptured, the setfe cinere- 

 ous, robust and conspicuous but not dense. Head rather finely, deeply, very 

 densely punctate, the transverse impression feeble, indicated by a narrow 

 polished and abruptly impunctate line ; beak densely, rugosely punctate, 

 setulose, rather stout and broadly, evenly arcuate in basal half, becoming 

 straight and slightly tapering thence to the apex, very nearly as long as the 

 head and prothorax ; antennae inserted at the middle, moderately slender, the 

 basal joint of the funicle fully as long as the next three, second obconical, but 

 slightly longer than wide, three to seven transverse, club oval, pubescent, 

 with the basal joint large. Prothorax two-fifths wider than long, the sides 

 feebly but distinctly convergent and straight from the base to apical third, 

 then gradually, evenly rounded and convergent to the small but evident sub- 

 apical constriction, the apex transversely truncate and much less than one- 

 half as wide as the base, the latter transverse, the lobe constituting a little 

 more than one-third of the entire width, rounded and prominent ; disk very 

 deeply and densely punctate, without trace of impunctate line, the punctures 

 somewhat coarse. Scutellum moderate. Elytra at the small but prominent 

 humeral callus much wider than the prothorax, three-fourths longer than the 

 latter, a little longer than wide, broadly hemi-elliptical in outline ; disk with 

 distinct but not very deep striae, tlie intervals flat, slightly unequal, about 

 twice as wide as the grooves, coarsely, confusedly, closely and rugosely punc- 

 tured throughout but shining. Abdomen rather coarsely and deeply punctate, 

 the punctures well separatcid. Prosternum fla', the coxse very reniote. 

 Length 3.3 mm. ; width 1.7 mm. 



