A REVISION OF NORTH AMERICAN CHRYSOBOTHRIN1 41 



Male. — Moderately elongate, strongly shining, bronzy brown with a faint 

 cupreous tinge; beneath uniformly reddish cupreous, and more strongly 

 shining than above. 



Head bright green, becoming reddish cupreous on occiput, with a vague, 

 longitudinal carina on occiput, an indistinct coppery chevron on vertex, and 

 a smaller, vague, greenish chevron on the front; front nearly flat; surface 

 coarsely, rather densely, uniformly punctate, sparsely clothed with short, semi- 

 erect, inconspicuous hairs, the intervals nearly smooth ; clypeus broadly, rather 

 deeply, arcuately emarginate in front, broadly rounded on each side. Antenna, 

 bronzy green,' gradually narrowed to apex ; intermediate segments moderately 

 compact, wider than long, subtruncate at outer margins ; third -segment slightly 

 longer than fourth. 



Pronotum nearly twice as wide as long, slightly wider at apex than at base, 

 widest at middle; sides regularly rounded; anterior margin slightly sinuate, 

 with a vague, broadly rounded, median lobe; base slightly emarginate on each 

 side, with the median lobe slightly produced and broadly rounded; disk mod- u 

 erately convex, with a vague, smooth, median line in front of scutellum, and 

 a smooth, transverse space on each side near middle, but without distinct 

 callosities or depressions ; surface coarsely, rather densely punctate, slightly 

 rugose toward sides, sparsely clothed with long, erect, inconspicuous hairs, 

 intervals indistinctly granulose. 



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

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

 are separately broadly rounded ; lateral margins coarsely serrate ; basal de- 

 pressions broad and deep ; humeral depressions vaguely indicated ; disk mod- 

 erately convex ; surface finely, densely, uniformly punctate, rather densely 

 clothed with moderately long, erect, whitish hairs, the intervals densely, finely 

 granulose. Each elytron with four rather vague, longitudinal costae, which 

 are elevated posteriorly, extending from apex to base, and two indistinct foveae, 

 one at basal third, the other behind middle. 



Abdomen beneath sparsely, finely, irregularly punctate, sparsely clothed with 

 short, recumbent, white hairs, more densely pubescent toward sides, with 

 smooth lateral callosities, the intervals indistinctly granulose ; last visible 

 sternite broadly, rather deeply, arcuately emarginate at apex, without a sub- 

 marginal ridge, lateral margins coarsely serrate ; eighth tergite triangularly 

 emarginate at apex, finely granulose, and coarsely, rather densely punctate. 

 Prosternum densely, finely punctate toward sides, coarsely punctate at middle, 

 more or less rugose, sparsely clothed with long, recumbent, white hairs, with 

 a distinct, broad, short lobe in front. Anterior femur with a long, acute tooth, 

 which is coarsely dentate on outer margin. Anterior tibia slightly arcuate, with 

 a small, triangular tooth at apical fourth ; middle and posterior tibiae straight. 



Length 10 mm., width 3.5 mm. 



Redescribed from the single male type in the collection of W. J. 

 Chamberlin. 



Female. — No females have been examined by the writer, but Beer (1940) 

 records collecting three males and one female, and states that the female has 

 the antenna coppery bronze, and the last visible abdominal sternite rather 

 completely rounded at the apex, similar to that of Chrysol)Othris harrisi (Hentz). 



Type locality. — Prescott, Ariz. ■ , 



DISTRIBUTION 



From material examined: 

 Arizona: Prescott, July 1923, holotype (W. J. Chamberlin). 



Also recorded by Beer (1940) from near Wilderville, on the banks 

 of the Applegate River, Oreg. 



Hosts. — The larval habits are not known, but F. M. Beer collected 

 the adults in Oregon on chaparral (Ceanothus cuneatus (Hooker) 

 Nuttall). 



This species is very closely allied to deserta and differs from it 

 only in having the longitudinal costae on the elytra slightly elevated 



