36 Bulletin of the Brooklyn Entomological Society Vol. XI 



the apex narrowly rounded, margin with one or two denticles posteriorly; 

 crest well developed, margin not dentellate. Elytra elongate, parallel, 

 slightly more than twice as long as wide, apices (c?) not prolonged or 

 truncate, sutural angles rounded. Body beneath as usual; last ventral 

 segment (c?) broadly transversely impressed toward the apex, the margin 

 feebly truncate. , 



Length 3.7-3.9 mm.; width 1.2-1.25 mm. 



Described from two male specimens taken at Yuma, Arizona, by Dr. 

 Fenyes. 



This species by the above characters is separable easily from 

 all previously described forms. It would by Casey's table fall 

 near cavicornis. Its true relationship may be more definitely de- 

 termined when the female becomes known. 



Notoxus arizonensis n. sp. Form rather slender, rufotestaceous, feebly 

 shining, elytra with rather narrow more or less bilunate subapical and 

 median transverse blackish or dusky fasciae, and with a subsutural dusky 

 spot at base, all subject to some variation in development, the basal spot 

 becoming subobsolete in the less distinctly marked specimens. Vestiture 

 cinereous, short, fine, moderately close, recumbent, intermixed on the 

 elytra with sparse short semierect hairs, which are quite inconspicuous. 

 Antennae longer than the head and prothorax, scarcely thickened apically, 

 the tenth joint one third longer than wide. Prothorax slightly wider than 

 the head, finely punctate with a tendency toward strigosity at sides ante- 

 riorly; horn well developed, one third to two fifths as wide as the protho- 

 rax in the male, obviously wider on the female, margins moderately re- 

 flexed, especially at apex, but not dentellate ; crest feebly margined, not 

 dentellate. Elytra about two thirds wider than the prothorax, twice as 

 long as wide or slightly more, slightly or scarcely inflated posteriorly, 

 punctuation fine but moderately close, apices rather broadly conjointly 

 rounded as viewed from above, with a minute sutural notch, similar in the 

 sexes. Body beneath finely punctate and pubescent. In the male the last 

 ventral segment is scarcely longer than the preceding, the apex distinctly 

 truncate, the truncation just perceptibly anteriorly arcuate, with its limits 

 broadly subangulate. In the female the last ventral is as a rule nearly 

 twice as long as the preceding, the apex rounded. 



Length 3.3-4 mm.; width 1.1-1.25 mm. Southern Arizona. 



The type is a male from the Chiricahua Mts., taken by Mr. V. 

 L. Clemence, July 9. Other examples are from the Huachuca 

 Mts., July (Clemence), and from Nogales, August (Nunen- 

 macher). The species in its elytral markings is almost an exact 

 reproduction of delicatus Csy., in the latter however the erect 

 hairs of the upper surface are more marked, the thoracic horn 

 distinctly dentellate, the crest obsolete, and the sexual characters 



