April, i9i6 Bulletin of the Brooklyn Entomological Society 37 



at the ventral apex different. Arisonensis should follow delicatus 

 in the table given by Casey. 



Notoxus montanus Csy. This species, which was described from a 

 unique female specimen from Colorado, is rather widely distributed in 

 the southern Rocky Mountain region. Specimens are known to me from 

 Colorado — Florissant, Aug. 6 (Rohwer) ; New Mexico — Santa Fe, July 

 (Fenyes) ; Pecos — June (Cockerell) ; Arizona — Chiricahua and Huachuca 

 Mountains (Clemence) ; Flagstaff (Fenyes) ; and Williams (collected by 

 the writer). 



In the male the front tibiae are toothed internally as in calcaratus, the 

 last ventral segment is truncate, the truncation feebly arcuate-emarginate ; 

 sutural angles of elytra rounded in some examples, seemingly very faintly 

 produced in others. 



The identity of this species has been established by Col. Casey, 

 who has kindly compared Chiricahua examples with his type. 



Notoxus similis n. sp. Moderately elongate, shining, recumbent pubes- 

 cence intermixed with numerous semierect setse of moderate length. Head 

 and prothorax rufous to rufopiceous, the horn paler ; elytra rufotestaceous, 

 with a basal spot each side of the suture narrowly connected with a smaller 

 lateral spot (sometimes absent), a more or less biarcuate median fascia, 

 and the apex black; the tips becoming indefinitely paler, chiefly from 

 transmitted light. Antennae, legs and body beneath rufotestaceous, the 

 abdomen piceous. Antennae nearly half as long as the body, very feebly 

 incrassate apically, the tenth joint about one half longer than wide. Head 

 smaller than the prothorax, distinctly, not very sparsely punctate, tempora 

 oblique, broadly arcuate, nearly as long as the eyes. Prothorax as long as 

 wide, moderately closely punctate; horn (J') rather stout, crest well devel- 

 oped, reflexed margins not dentellate; in the ? distinctly broader and a 

 little constricted basally. Elytra varying from slightly less to slightly 

 more than twice as long as wide, feebly inflated at middle, subbasal trans- 

 verse impression distinct, apices slightly prominent, the sutural angles 

 feebly sinuately produced in both sexes. Body beneath finely punctate and 

 pubescent as usual. Last ventral of male distinctly arcuately emarginate 

 at apex, front tibiae toothed at the middle of the inner side. 



Length 3.3-3.6 mm. ; width 1.1-1.35 mm. 



The type is a male from Glenwood Springs, Colorado. Other examples 

 are from Antonito, Colorado, and Santa Fe, New Mexico — all collected 

 by Dr. Fenyes. 



This species is in all essentials very similar to montanus Csy., 

 and females of the two cannot always be determined with cer- 

 tainty. The dark markings are as a rule less developed at the 

 "elytral base in similis, and the punctuation of the head and 

 thorax is typically stronger and closer, but these characters are 

 bath variable. The prothoracic horn is notably stouter in the 



