A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 



53 



(13) Chrysobothris oregona Chaniberlin 



(Fig. 13 ; fig. 112, F) 



Chrysobothris oregona Chamberlin, 1834, Pan-Pacific Ent. 10: 38, 40, fig. 9. 

 Chrysobothris planomarginata Chamberlin, 1938, Pan-Pacific Ent. 14 : 10-11, figs. 

 1-4. (New synonymy.) 



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Figure 13. — Anterior tibia of male (A), clypeus (B), and last visible abdominal 

 sternite of male (0) and of female (D) of Chrysobothris oregona. 



Male. — Broadly elongate, rather strongly convex above, moderately shining, 

 uniformly bronzy brown, with a distinct cupreous tinge ; beneath similar in color to 

 dorsal surface, but more strongly shining. 



Head bronzy green on front, becoming brownish cupreous on occiput, with a 

 narrow, smooth, longitudinal carina on occiput; front nearly flat, with two 

 small, irregular, smooth spaces; surface coarsely, rather densely, shallowly 

 punctate, sparsely clothed with long, semierect, whitish hairs, intervals nearly 

 smooth ; clypeus broadly, rather deeply, angularly emarginate in front, broadly 

 rounded on each side. Antenna uniformly bronzy green, scarcely narrowed to 

 apex ; intermediate segments wider than long, broadly rounded at outer margins ; 

 third segment slightly longer than second or fourth. 



Pronotum twice as wide as long, slightly narrower at apex than at base, widest 

 near apex; sides arcuately converging at apical angles, slightly converging 

 posteriorly, and arcuately constricted near posterior angles, which are rectangular ; 

 anterior margin slightly sinuate, with a vague, broadly rounded, median lobe ; 

 base angularly emarginate on each side, median lobe slightly produced and broadly 

 rounded; disk more or less flattened, slightly uneven, with a vague, elongate, 

 median depression, which does not extend to base or anterior margin ; surface 

 densely, finely, irregularly punctate, more or less rugose toward sides, sparsely 

 clothed with short, erect, inconspicuous hairs. 



Elytra at base subequal in width to pronotum, nearly twice as long as wide, 

 widest behind middle; sides slightly diverging from humeral angles to behind 

 middle, then arcuately converging to tips, which are separately broadly rounded ; 

 lateral margins vaguely serrate posteriorly; basal depressions broad and deep; 

 humeral depressions shallow ; disk moderately convex ; surface densely, coarsely, 

 irregularly punctate, sparsely clothed with short, erect, white hairs, intervals 

 obsoletely granulose. Each elytron with four more or less distinct, smooth, 

 longitudinal costae, the first distinct from apex to basal fourth, second distinct 

 on apical half, but becoming obsolete basally, third distinct at middle, obsolete 



