A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 69 



Head purplish brown, with a distinct cupreous and bronzy tinge in different 

 lights, without smooth callosities or longitudinal carina ; front nearly flat ; 

 surface coarsely, shallowly, confluently punctate, densely clothed with long, 

 recumbent, whitish hairs, the intervals densely granulose; clypeus broadly, 

 shallowly, arcuately emarginate in front, obliquely truncate on each side. An- 

 tenna purplish brown, gradually narrowed to apex; intermediate segments 

 compact, slightly wider than long, broadly rounded at outer margins; third 

 segment slightly longer than fourth. 



Pronotum nearly twice as wide as long, subequal in width at base and apex, 

 widest behind middle ; sides arcuately rounded ; anterior margin strongly 

 sinuate, with a distinct, broadly rounded, median lobe; base arcuately emargi- 

 nate on each side, median lobe slightly produced, and broadly rounded; disk 

 rather strongly, uniformly convex, without depressions or callosities ; surface 

 coarsely, densely, uniformly punctate, sparsely clothed with short, recumbent, 

 white hairs, the intervals finely, densely granulose. 



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

 nearly parallel from humeral angles to apical third, then arcuately converging 

 to the tips, which are separately broadly rounded ; lateral margins finely serrate ; 

 basal depressions broad and moderately deep ; humeral depressions broad and 

 shallow; disk moderately convex, without discal foveae, but the inner costa 

 on each elytron vaguely indicated posteriorly; surface finely, densely punctate 

 posteriorly, cribrate basally, clothed with a few short, erect, white hairs. 



Abdomen beneath finely, densely punctate, densely clothed with moderately 

 long, recumbent, white hairs, which nearly conceal the surface, smooth along 

 anterior margins of sternites, without smooth lateral callosities, intervals 

 densely, finely granulose ; last visible sternite broadly, very shallowly, arcuately 

 emarginate at apex, without a submarginal ridge, lateral margins coarsely ser- 

 rate ; eighth tergite subtruncate at apex, coarsely, densely punctate, but not 

 longitudinally carinate. Prosternum coarsely, confluently punctate, rather 

 densely clothed with long, semierect, whitish hairs; anterior margin with a 

 broad, moderately long, median lobe. Anterior femur without a tooth. An- 

 terior tibia arcuate, expanded toward apex, and armed with a slightly rounded, 

 elongate dilation ; middle and posterior tibiae straight. 



Length 6.5 mm., width 2.5 mm. 



Redescribed from a male specimen from Arizona, in the United 

 States National Museum. 



Female. — Not examined. 



Type locality. — El Paso, Tex. ; type in the California Academy of 

 Sciences. 



DISTRIBUTION 



From material examined 



Arizona: Catalina Springs, March 21, and May 3-5; Santa Rita Mountains, 

 June 3 (Hubbard and Schwarz). 



Also recorded in the literature from : 



Texas: El Paso, April 27, 1927, type (J. O. Martin). 



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

 collected on Jatropha multifield Linnaeus at Catalina Springs, Ariz.,, 

 by Hubbard and Schwarz. 



In the few specimens examined no variations worthy of note have 

 been observed except in size, the length ranging from 5.5 to 6.5 mm. 

 The reclescription was made from a specimen which was carefully 

 compared with the unique female holotype by E. Gorton Linsley, who 

 writes that the holotype differs slightly in color from the specimen 

 sent, and in having the head aeneous in front with the sides and 

 vertex slightly greenish, and the pronotum a very dark bluish black. 



