348 Memoirs on the Coleoptera 



small but deep, everywhere dense and subconfluent, not much coarser but 

 in longitudinal rugulse narrowly at the sides; median line feebly tumes- 

 cent but not at all smooth; bSsal lobe broadly rounded, the scutellum 

 transversely oval, impressed at the middle; elytra barely a fourth longer 

 than wide, only two-fifths longer than the prothorax and not wider, 

 except at the notably prominent humeral callus, the sides oblique and 

 distinctly arcuate, the apex obtusely rounded; striae fine, the small 

 punctures bearing whitish decumbent hair-like scales, the intervals very 

 broad, moderately though very densely punctate throughout; abdomen 

 rather strongly, closely punctate, loosely so medio-basally, where there 

 is a very shallow oval impression in the male. Length (cf) 4.8 mm.; 

 width 2.3 mm. Kansas (Belvidere), — Knaus. One example. 



Differs from millepora in its larger size, more parallel and larger, 

 prothorax, finer elytral striae, less defined and more crowded inter- 

 stitial punctures and less transverse scutellum; in that species the 

 elytra are distinctly more obtusely rounded behind in the female 

 than in the male. 



Onychobaris implicata n. sp. — Cuneiform, the body widest at anterior 

 third of the prothorax; coloration, lustre, sculpture and vestiture nearly 

 as in the preceding and millepora; beak almost as in the preceding; 

 prothorax shorter, a third wider than long, the sides nearly straight, 

 diverging slightly from the base in line with the elytral sides, evenly but 

 rapidly rounding in apical third, more transversely toward apex, which 

 is much less than half as wide as the base, with polished and smooth 

 margin as in the preceding and millepora; sculpture and lobe nearly 

 similar, the scutellum more transverse and not impressed but punctured 

 throughout; elytra a fourth longer than wide, not quite one-half longer 

 than the prothorax, the oblique sides broadly arcuate, the apex rounded; 

 humeral callus smaller and less prominent than in pollens; striae not 

 quite so fine, the interstitial punctures similarly very dense but some- 

 what stronger; abdomen slightly less coarsely, densely punctate, the 

 punctures only a little less close-set in the somewhat deeper basal im- 

 pression of the male. Length (cf ) 4.4 mm.; width 2.0 mm. Colorado 

 (locality unrecorded). 



In millepora the elytra are slightly less abbreviated than in either 

 of the preceding species, the sides of the prothorax feebly converging 

 and the interstitial punctures, though very close, are better defined, 

 deeper and rather coarser. Though these three forms are closely 

 allied, I have scarcely any doubt that they are specifically distinct; 

 the following, although belonging to the same group of the genus, 

 differs notably in elytral sculpture : 



Onychobaris mansueta n. sp. — Somewhat smaller and not so stout as 

 in the preceding, black throughout and slightly more shining, especially 

 on the elytra, elongate-suboval, convex; beak in the female rather 



