A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 155 



(66) Chrysobothris grandis Chaniberlin 



(Fig. 63) 



Chrysobothris grandis Chamberlin, 1938, Pan-Pacific Ent. 14: 14-16, figs. 17-19. 



Figure 63. — Olypeus (A) and last visible abdominal sternite of the female (B) 

 of Chrysobothris grandis. 



Female. — Broadly elongate, feebly convex above, moderately shining, piceous on 

 elevated smooth spaces, lilacinous in punctured depressed areas ; beneath purplish 

 brown, and more strongly shining than above. 



Head purplish brown, with a narrow, smooth, longitudinal carina on occiput, 

 and two small, smooth callosities on front ; front nearly fiat ; surface coarsely, 

 shallowly, irregularly, confluently punctate, sparsely clothed with short, erect, 

 inconspicuous hairs; clypeus broadly, shallowly, arcuately emarginate in front, 

 subtruncate on each side. Antenna uniformly purplish brown, slightly narrowed 

 ro apex ; intermediate segments slightly wider than long, broadly rounded at 

 outer margins; third segment slightly shorter than following two segments 

 united. 



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

 widest along middle; sides arcuately converging at base and apex, parallel and 

 sinuate at middle ; anterior margin deeply, arcuately emarginate, without a 

 distinct median lobe; base slightly, arcuately emarginate on each side, median 

 lobe slightly produced and broadly rounded ; disk slightly convex, uneven, with 

 a shallow, longitudinal, median depression on apical half, limited on each side 

 anteriorly by a broad, irregular, elevated, smooth space, and with a round, 

 elevated, smooth callosity on each side at base, midway between middle and 

 posterior angle ; surface reticulate toward sides, densely, finely, irregularly 

 punctate in depressed areas. 



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

 nearly parallel from humeral angles to behind middle, then arcuately con- 

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

 serrate ; basal and humeral depressions broad and deep ; surface glabrous, finely, 

 densely punctate between the elevated, smooth spaces. Each elytron with three 

 more or less distinct, smooth costae ; first rather strongly elevated, extending 

 from base to apex, narrow and straight on apical half, broader and sinuate on 

 basal half; second and third costae broad^v interrupted, more or less joined to 

 each other and first costa by irregular, elevated, smooth spaces. 



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

 sides with short, semierect, white hairs, with indistinct lateral callosities, 

 intervals obsoletely granulose; last visible sternite angularly emarginate at 

 apex, longitudinally elevated on each side on basal half, but without a distinct 

 submarginal ridge, lateral margins coarsely serrate except near apices ; eighth 

 tergite coarsely, deeply, confluently punctate, with a small angular notch at 

 apex. Prosternum coarsely, densely punctate, sparsely clothed with short, 

 erect, white hairs; anterior margin with a broad, very narrow, median lobe. 

 Anterior femur with a broad, obtuse tooth, which is finely dentate on outer margin. 

 Anterior tibia slightly arcuate ; middle and posterior tibiae straight. 



Length 17 mm., width 6.6 mm. 



