A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 109 



reddish cupreous; beneath black, with greenish and purplish reflections in dif- 

 ferent lights, and with posterior femora more or less reddish cupreous. 



Head with a smooth longitudinal carina on occiput ; front nearly flat ; surface 

 coarsely, confluently punctate, densely granulose, densely clothed on front with 

 long, recumbent, white hairs; clypeus semicircularly emarginate in front, sub- 

 truncate on each side. Antenna bright reddish cupreous, paler toward outer 

 margins of segments, slightly narrowed to apex; intermediate segments trans- 

 verse, broadly truncate at outer margins ; third segment nearly as long as follow- 

 ing two segments united. 



Pronotum one and one-half times as wide as long, distinctly narrower at base 

 than at apex, widest near apex; sides arcuately rounded at apex, then strongly 

 obliquely converging to posterior angles (slightly sinuate at middle) ; anterior 

 margin strongly sinuate, with a distinct, broadly rounded, median lobe; base 

 broadly, arcuately emarginate on each side, median lobe strongly produced, and 

 narrowly rounded in front of scutellum ; disk slightly convex, with a vague de- 

 pression on each side of middle near base, but without distinct depressions or 

 callosities ; surface glabrous, coarsely, deeply, confluently ocellate-punctate, becom- 

 ing transversely rugose toward sides. 



Elytra at base distinctly wider than pronotum, twice as long as wide; sides 

 nearly parallel from humeral angles to behind middle, then arcuately converging 

 to tips, which are conjointly broadly rounded ; lateral margins coarsely serrate ; 

 basal depressions broad and moderately deep ; humeral depressions elongate and! 

 shallow; surface glabrous, slightly uneven, coarsely, deeply, densely, uniformly 

 punctate, more or less scabrous at base, intervals nearly smooth. Each elytron 

 with three more or less distinct longitudinal costae ; first distinct on apical half, 

 smooth, parallel with sutural margin, and sinuate near apex; second shorter, 

 indistinct, extending backward from antemedian fovea; third barely indicated, 

 following outline of lateral margin ; and with three shallow, rounded, cupreous 

 foveae, one in front of middle and two at apical third. 



Abdomen beneath sparsely, coarsely punctate, smooth along anterior and poste- 

 rior margins of sternites, rather densely clothed with long, recumbent, whitish 

 hairs, especially toward sides, without smooth lateral callosities, intervals 

 vaguely granulose; last visible sternite broadly, semicircularly emarginate at 

 apex, without a submarginal ridge, lateral margins distinctly serrate on apical 

 halves ; eighth tergite densely granulose, coarsely, sparsely punctate, lower margin 

 broadly rounded, upper margin coarsely dentate and broadly, arcuately emarginate 

 at apex, but not longitudinally carinate. Prosternum coarsely, confluently punc- 

 tate, more or less transversely rugose, densely clothed with long, recumbent, white 

 hairs ; anterior margin with a distinct, broad, rather long, median lobe. Anterior 

 femur with a large, rather acute tooth, which is coarsely dentate on outer 

 margin. Anterior tibia strongly arcuate, with a broadly rounded, notched dila- 

 tion at apex, with inner margin of tibia distinctly notched behind dilation ; middle 

 and posterior tibiae nearly straight, the former muricate at apex. 



Length 7.5 mm., width 3 mm. 



Redescribed from the male type in the collection of H. C. Fall. 



Female. — Differing from the male in having the front of the head uniformly 

 reddish cupreous, and more coarsely punctured and sparsely pubescent, the 

 antenna piceous, with a faint cupreous tinge, the last visible sternite more elon- 

 gate, and angularly emarginate at apex, the eighth tergite broadly rounded at 

 apex and longitudinally carinate, and the anterior tibia unarmed at apex. 



Type locality. — "Arizona," no definite locality. 



DISTRIBUTION 



From material examined : 



Arizona: No definite locality. Hot Springs, June 24-26 (Barber and Schwarz). 



Santa Catalina Mountains, May 10, 1913 (M. Chrisman). 

 Caufornia: 23 miles south of Vidal, Riverside County, June 12, 1940 (W. F. 



Barr). 



Hosts. — The larval habits are unknown, but the adults have been col- 

 lected on catclaw (Acacia sp.) in Arizona by M. Chrisman. 



