5o8 Memoirs on the Coleoptera 



thorax, the antennae at the middle; prothorax only a third wider than 

 long, the sides evenly converging, evenly and rather strongly arcuate 

 from base to the apical constriction, the tubulate apex a little less than 

 half as wide as the base; punctures coarse, separated by their own 

 diameters, dense laterally, the propleura rugulate; impunctate median 

 line only visible in basal half; elytra three-sevenths longer than wide, a 

 fourth wider than the prothorax and a little more than twice as long, the 

 feebly oblique sides nearly straight to the broad, circularly rounded apex, 

 the humeral prominences large; grooves rather coarse, with small, 

 remote punctures along the bottom, the intervals subequal, only one- 

 half wider than the grooves, each with a single series of strong and close- 

 set punctures, which are two-fifths as wide as the interval; sterna very 

 coarsely, densely punctate, the abdomen much more finely and loosely. 

 Length (9) 2.65 mm.; width 1.35 mm. Arizona (locality unrecorded 

 but different from that of the type of egregia). One specimen. 



The type of this species I considered in connection with the type 

 of the larger egregia, in my revision, but it seems to be a different 

 species, differing in its smaller size, smaller and less transverse 

 prothorax, with more evenly arcuate sides and very much less dense 

 punctuation, and with less coarse and more evenly serial interstitial 

 punctures; the metasternal punctures are coarser though equally 

 dense. 



Cholinobaris n. gen. 

 The body in this genus is strongly remindful of Oomorphidius 

 erasus, being rhomboidal, very convex and smooth, with virtually 

 glabrous integments, but the prothorax is not tubulate at apex 

 above, and the elytral sculpture is quite different. The beak is 

 very thick, with strongly decussate mandibles, the antennal funicle 

 rather compact, the club abrupt but very small, almost circular, 

 its basal joint fully one-half the mass. The anterior coxae are 

 somewhat widely separated and the prosternum unmodified. The 

 prothorax is similarly without basal lobe, but the scutellum is very 

 different, being notably elongate and posteriorly attenuate, though 

 small. The third tarsal joint is rather narrowly dilated but is 

 bilobed, and the tarsal claws seem to be very small and free, though 

 on all except one tarsus of the type specimen, and this partially 

 concealed from view, the claws have been broken away. The type 

 may be described as follows: 



Cholinobaris rhomboidea n. sp. — Rhomboidal, very convex, moder- 

 ately shining, though alutaceous and glabrous above; under surface 

 smooth and glabrous, excepting the sterna of the hind body and the 



