174 GEO. n. HORN, M. D. 



5f. conformis Lee. — Testaceous, moderately shining, sparsely clothed with 

 coarse hair with erect hairs intermixed ; elytra with sciitellar and lateral spots, and 

 band slightly post-median piceous: head very sparsely punctate, front nearly flat; 

 thorax globose, very sparsely punctate and hairy; surface shining, horn narrow, 

 scarcely wider than the crest, rather widely margined at the sides and in front 

 not serrate, crest abruptly but not much elevated, margined at sides and apex, not 

 serrate; elytra oblong, humeri distinct, apices obliquely truncate and sub-spinous 

 in the male, conjointly rounded and very obtuse in the female, the surface sliining, 

 with sparse punctures, which become obsolete toward the apex ; body beneath very 

 sparsely punctate and slightly pubescent. Length .12— .14 inch; 3 — 3.5 mm. 



The males in addition to the elytral character have the last ventral seg- 

 ment more obtuse, and with a slight depression 'J he crest of the horn 

 rises more abruptly in the male, and is somewhat higher ; the sides of 

 the horn being nearly parallel in the male, but more oval in the female. 



The color of the elytra varies greatly. The normal style is that noted 

 above, that is a small post-scutellar spot on each side, an oblong spot 

 behind the humeri, a transverse band behind the middle as in monodon. 

 These markings may become suffused, and the color nearly entirely pice- 

 ous, or they may fade entirely, and the whole surface become uniformly 

 testaceous. 



This species is one of a group of three which are troublesome to sepa- 

 rate. The .thorax is nearly truly globose, and the elytra oblong; in these 

 particulars it differs from cavicornis. In dennddtus the form is still more 

 elongate, and the elytra unusually coarsely punctured. 



Occurs in Southern California and Arizona. 



Rf. caviC4»rili!$ Lee— Dark testaceous, slightly robust in facies ; surface 

 sparsely hairy ; elytra with piceous markings as in r-ow/or-jww, but more irregular 

 and less distinct; head sparsely punctate, front slightly concave; thorax oval at 

 least one-fourth broader than long (excluding the horn) ; surface moderately shin- 

 ing, sparsely punctate and hairy, horn narrow, moderately long, feebly margined 

 at the sides, more broadly in fi-ont, margin not serrate, crest abruptly elevated, 

 distinctly margined, not serrate; elytra oval, humeri distinct, apices obliquely 

 truncate in the male, conjointly rounded and obtuse in the female: surface mod- 

 erately punctate, nearly as in monodon ; body beneatii very sparsely punctulate 

 and pubescent. Length .12 inch : ?> mm. 



The sexual characters are as in conformis, but the female has the crest 

 as strongly elevated as in the male, while the horn itself is scarcely 

 broader. 



The elytral markings preserve the type of conforms, but the spots are 

 less defined, and the transverse fascia sends processes from the front and 

 hind margins of an indefinite extent. The differences between this spe- 

 cies and those more closely resembling it have been referred to. 



Occurs near San Francisco, Cal., and Nevada. 



