206 MISC. PUBLICATION 4 70, U. S. DEPT. OF AGRICULTURE; 



Female. — Broadly elongate, moderately convex above, rather strongly shining, 

 piceous, with a faint purplish or bronzy reflection; beneath cupreous, with a 

 faint greenish tinge, bluish black along margins of abdominal sternites, and 

 more strongly shining than above. 



Head cupreous, piceous on elevations, with a distinct, smooth, longitudinal 

 carina on occiput, and two broad, transversely biarcuate, smooth callosities, 

 one behind antenna, the other above middle; front flat and uneven; surface 

 coarsely, densely punctate, except on callosities, densely clothed with long, 

 semierect, white hairs; clypeus broadly, deeply, arcuately emarginate in front, 

 arcuately roundt d on each side. Antenna brownish cupreous, with a faint 

 bronzy tinge, slightly narrowed to apex; intermediate segments compact, as 

 wide as long, broadly truncate at outer margins ; third segment nearly as long 

 as following four segments united. 



Pronotum twice as wide as long, narrower at apex than at base, widest at 

 apical third; sides strongly, arcuately converging near apical angles, obliquely 

 converging and slightly sinuate from apical third to posterior angles ; anterior 

 margin arcuately emarginate, without a median lobe; base indistinctly, arcu- 

 ately emarginate on each side, median lobe slightly produced, subtruncate in 

 front of scutellum ; disk moderately convex, without a median depression or 

 smooth callosities, but with three vague depressions on each side, one near 

 anterior margin, one near base, and the other near apical angle; surface finely, 

 sparsely punctate at middle, coarsely, confluently punctate and rugose at sides, 

 sparsely clothed with long, inconspicuous, erect hairs, intervals smooth. Scutel- 

 lum long, acute posteriorly. 



Elytra wider than pronotum, nearly twice as long as wide ; sides parallel from 

 humeral angles to apical third, then arcuately converging to tips, which are 

 narrowly rounded ; lateral margins coarsely serrate ; basal depressions broad 

 and deep; surface glabrous, finely, densely, irregularly punctate. Each elytron 

 with four distinctly elevated, smooth, longitudinal costae; first extending from 

 apex to basal depression; second joining fourth near apex, extending forward 

 to outside of basal depression ; third extending from a cordate fovea at apical 

 third forward to outside of humerus; fourth more obscurely elevated than the 

 others, and following outline of lateral margin ; and with two indistinct discal 

 foveae, one in front of middle interrupting second costa, and one behind middle 

 between second and third costae. 



Abdomen beneath coarsely fossulate-punctate, sparsely at middle and more 

 densely at sides, rather densely clothed at sides with long, semierect, white hairs, 

 intervals obsoletely granulose ; sternites vaguely, broadly, longitudinally de- 

 pressed at middle, smooth along anterior and posterior margins, and with indis- 

 tinct lateral callosities ; last visible sternite transversely sinuate at apex, with 

 the angles acutely produced, longitudinally carinate at middle, and with a 

 distinctly elevated, serrate, submarginal ridge, lateral margins not serrate, but 

 slightly sinuate at apical third; eighth tergite coarsely, confluently punctate, 

 densely granulose, broadly rounded at apex. Prosternum transversely depressed 

 along anterior margin, coarsely, sparsely punctate, sparsely clothed with long, 

 erect, white hairs ; anterior margin truncate, strongly deflexed, without a median 

 lobe. Anterior femur with a short, acute tooth, which is sinuate on outer 

 margin. Anterior and middle tibiae slightly arouate, unarmed; posterior tibia 

 straight. 



Length 17.5 mm., width 8 mm. 



Redescribed from the female lectotype, No. 3444, in the Academy of 

 Natural Sciences of Philadelphia. 



Male. — Differing from the female in having the front of the head more finely, 

 confluently punctate, with a short, serrate, transverse, strongly elevated carina 

 behind clypeus, the outer segments of the antenna reddish cupreous, the last 

 visible abdominal sternite broadly, longitudinally depressed at middle, and 

 nearly semicircularly emarginate at apex, with the angles strongly produced 

 and obliquely truncate, the eighth abdominal tergite more coarsely, sparsely 

 punctate, and the anterior and middle tibiae armed with a series of small 

 teeth on their inner margins. 



Type locality. — Texas, no definite locality. 



DISTRIBUTION 



From material examined : 

 Arizona: Sabino Canyon, reared (Geo. Hofer). Hot Springs, June 22 (Hubbard 

 and Schwarz). Redington, August 9, 1915 (M. Chrisman). Santa Rita 



