34 Journal New York Entomological Society. [Voi. xvii. 



7. 0. striatus Lee, Proc. Acad., 1S54, p. 222. 



Size, color and form of /niisculus, the frontal lobe is not margined, 

 however, and the elytral striae are better marked than in wusculus. 

 The species seems to be rare in collections. There are two examples 

 in the LeConte collection, both from Arizona. Horn gives also New 

 Mexico, 



8. 0. inarmatus Schaef., Can. Ent., 1906, p. 270. 



A rather large species, though as usual variable in size, of a 

 brownish ferruginous color as in muse u his. Schaeffer describes the 

 mentum as being ''deeply longitudinally impressed from base to 

 apex," but in my only representative of the species it would be more 

 accurately described as flat posteriorly, deeply abruptly impressed in 

 front, the channel narrowing and growing shallower behind, disap- 

 pearing before reaching the basal margin. The femora and tibire are 

 entirely unarmed in all known specimens and Mr. Schaeffer remarks 

 that what he takes to be the females differ from the males only in 

 having the head less distinctly carinate and hardly at all impressed 

 before and behind the carina. The teeth of the anterior tibiae are 

 subequidistant, the upper tooth well developed and much more remote 

 from the base than from the middle tooth. My single example 

 measures 7.5 mm. in length. The species occurs in the Huachuca 

 Mts. of Arizona. 



9. 0. kansanus, new species. 



Oblong oval, moderately robust, testaceous, with short semi-erect pale hairs. 

 Labrum moderately emarginate. Mentum longitudinally impressed from apex to 

 base, the channel broader and less deep posteriorly. Frontal lobe with strong carin- 

 iform upper margin, vertex with a smooth transverse carina which is longer and well 

 developed in the male, shorter and less developed or subobsolete in the female, head 

 scarcely granulose, the punctures not dense and nearly simple, at least in the male. 

 Prothorax not quite twice as wide as long, surface moderately densely granulose, me- 

 dian line feebly impressed in posterior half. Elytra about one eighth longer than 

 wide, twice as long as, and not or but very slightly wider than the prothorax ; strise 

 moderately impressed, the intervals irregularly, subtriseriately punctate, the punc- 

 tures nearly as coarse as those of the strise ; sutural angle dentiform. Upper tooth of 

 front tibiae strong, remote from the base, and rather nearer the middle tooth than the 

 latter is to the apical one. Femora and tibise simple in both sexes. Basal joint of 

 hind tarsus subequal in length to the three following. Length 4-6 mm. ; width 2.2- 

 Z-i mm. 



Habitat. — Hamilton Co., Kansas (Snow); McPherson, Kansas 

 (Knaus); Las Vegas, New Mexico (Fenyes). 



