Coleopterological Notices, VI. G19 



Pronotum finely and much less densely punctured; liody small, the 



base of the prothorax strongly bisinuate gracilis n. sp. 



Elytral sulci shallow; body broader, the legs very stout; pronotal punc- 

 tures much finer than in (jramdatm and rather well separated, the in- 

 terspaces dull crassipes Csy. 



Third antennal joint distinctly less than twice as long as wide; pronotal 

 punctures rather coarse but somewhat separated, the basal angles very 



acute acutiis n. sp. 



Basal angles small and only feebly prominent posteriorly, tlie disk much 

 more finely, deeply, sparsely and distinctly punctured, less transverse 

 and more rounded at the sides. 

 Elytra in the female individually produced at apex, forming two processes 

 separated by a narrow deep incisure; antenna' long. 



caiidatiis n. sp. 

 Elytra not produced at apex, the antennie much shorter.. .rubripes u. sp. 



In the first group the form of the bod^- is nearly parallel, with 

 the elytra subequal in width to the prothorax, while in the second 

 section the el^'tra are distinctl}' wider and are suboval in form. 



As far as known, this genus is confined to the arid regions of 

 southern California and Arizona. 



IV. gracilis. — Somewhat narrow, moderately convex, dull, black, the 

 Tinder siirface rufo-piceous anteriorly; head rufescent toward apex; labrum, 

 antennte and legs brownish-rufous; surface virtually glabrous, the elytra with 

 minute stifi" inclined sette toward the sides. Head three-fourths as wide as the 

 prothorax, scabro-punctate, deeply sinuate at the middle of the clypeal 

 margin; antennse scarcely as long as the head and prothorax, the second joint 

 quadrate, third rather more than twice as long as wide, fourth distinctly 

 elongate, five to eight eqrral, quadrate, nine to eleven abruptly much wider, 

 forming a parallel three-jointed club, the tenth moderately transverse, the 

 eleventh rounded and only just visibly narrower. Prothorax about one-third 

 wider than long, widest before the middle, the sides feebly arcuate, becoming 

 convergent and perfectly sti-aight toward base; apex broadly, circularly sinuate, 

 the angles obtusely rounded ; base transverse, subequal to the apex, strongly 

 bisinuate, the angles posteriorly acute and prominent; disk rather indistinctly 

 punctate, impressed at the posterior margin along the sinuations, not at all 

 explanate laterally, the punctures elongate-oval, shallow, distinctly separated, 

 ■well defined along their anterior margins, the posterior more indefinite, be- 

 coming larger and more isolated toward base; interspaces finely, evenly and 

 strongly granulato-reticulate. Elytra scarcely one-half longer than wide, 

 twice as long as the prothorax and subequal in width, the sides broadly arcu- 

 ate, the apex gradually acutely ogival; sulci deep, with moderately distant 

 shallow punctures, the convex intervals asperulate. Ahdometi finely, sparsely 

 punctate, the propleunc with short sparse longitudinal cariniform elevations; 

 legs moderate in length, the femora stout and inflated toward tip, the tibiie 

 slender. Length 3.8 mm.; width 1.3 mm. 



