A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 93 



slightly rugose behind clypeus, rather densely clothed with long, erect, incon- 

 spicuous, whitish hairs, intervals obsoletely granulose ; clypeus broadly, sub- 

 angularly emarginate in front, obliquely subtruncate on each side. Antenna 

 piceous, bronzy green basally, nearly equal in width to apex; intermediate 

 segments rather compact, slightly wider than long, subtruncate at outer margins ; 

 third segment slightly longer than fourth. 



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

 widest near apical third; sides arcuately converging toward apex, slightly, 

 obliquely converging from apical third to posterior angles; anterior margin 

 strongly sinuate, with a broadly rounded, median lobe; base angularly emargi- 

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

 moderately convex, with a shallow, median sulcus; surface coarsely, deeply, 

 irregularly punctate at middle, more confluently punctate toward sides, inter- 

 vals obsoletely granulose. 



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

 of each elytron abruptly angulated at middle, transverse externally; sides 

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

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

 basal depressions broad and very deep ; humeral depressions broad and shallow ; 

 surface glabrous, uneven, coarsely, densely, deeply, irregularly punctate be- 

 tween the elevated, sparsely punctate areas, intervals densely granulose. Each 

 elytron with first costa strongly elevated on apical half, with numerous large, 

 irregular, sparsely punctured, elevated spaces, and with large, transverse, 

 irregular, densely punctured areas. 



Abdomen beneath coarsely, sparsely, irregularly fossulate-punctate, sparsely 

 clothed with rather short, recumbent, white hairs, with more or less distinct 

 lateral callosities, intervals densely granulose; last visible sternite broadly, 

 deeply, arcuately emarginate at apex, without a distinct submarginal ridge, 

 lateral margins coarsely serrate; eighth tergite sparsely, coarsely punctate, 

 broadly rounded at apex. Prosternum coarsely, confluently punctate, more or 

 less rugose, rather densely clothed with long, recumbent, white hairs; anterior 

 margin transversely sinuate, without a median lobe. Anterior femur with a 

 short, obtuse tooth, which is coarsely dentate on outer margin. Anterior tibia 

 strongly arcuate, with a large, acute tooth near apex; middle tibia slightly 

 arcuate ; posterior tibia straight. 



Length 7.5 mm., width 3 mm. 



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

 reddish cupreous, the last visible sternite shallowly, broadly emarginate at apex, 

 the eighth tergite densely punctured, and the anterior tibia slightly arcuate 

 and unarmed near apex. 



Type locality. — Los Angeles County, Calif. 



Type material. — Type, allotype, and paratypes in the U. S. Na- 

 tional Museum, No. 55294. Paratypes in the collections of Mont A. 

 Cazier, J. R. Heifer, and William F. Barr. 



Described from 54 specimens (one type). The male type, the allo- 

 type, and 5 paratypes were collected at the type locality during May 

 by D. W. Coquillett; 1 paratype was collected at Coalinga, Calif., 

 May 14, 1938, by M. Cazier ; 45 paratypes were collected on California 

 juniper (Juniperus calif ornica Carriere) in the Tehachapi Mountains 

 near Rosamund and Willow Springe, Calif., during May 1939 by 

 J. R. Heifer; and 1 paratype was collected on Junipe? i us sp., at 

 Kernville, Kern County, Calif., June 7, 1940, by W. F. Barr. 



Variations. — The sculpture and color on the dorsal surface of the 

 body are rather constant, except that the color on the smooth, ele- 

 vated spaces on the elytra is slightly more greenish in some specimens 

 than in others. The sides of the pronotum in many of the specimens 

 are more or less sinuate and parallel at the middle, and in a few 

 specimens there is a vague depression on each side of the pronotum 

 near the lateral margin. The length is from 6.5 to 9 mm. 



