A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 183 



Figure 76. — Anterior tibia of male (A), clypeus (B), and last visible abdominal 

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



Male. — Moderately elongate, ratber strongly depressed .above, sligbtly sbining, 

 piceous on elevated spaces, cupreous in the depressed, densely punctured areas ; 

 beneath piceous, with purplish and greenish reflections, and more strongly shin- 

 ing than above. 



Head yellowish green in front, becoming piceous on the occiput, with a distinct, 

 smooth, longitudinal carina on occiput; front nearly flat; surface coarsely, 

 deeply foveolate-punctate, rather densely clothed with long, erect, inconspicu- 

 ous hairs ; clypeus broadly, deeply, arcuately emarginate in front, obliquely sub- 

 truncate on each side. Antenna cupreous, greenish on basal segments, gradually 

 narrowed to apex ; intermediate segments about as wide as long, broadly sub- 

 truncate at outer margins ; third segment one-third longer than fourth. 



Pronotum three-fourths wider than long, slightly wider at base than at 

 apex, widest near apex; sides strongly converging at apex, obliquely converg- 

 ing from near apical angles to posterior angles; anterior margin deeply, 

 arcuately emarginate, without a median lobe; base slightly, broadly, arcuately 

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

 disk slightly convex, very uneven, with numerous well defined, smooth callosities, 

 and a vague, longitudinal, median depression ; surface densely, coarsely, irregu- 

 larly punctate between smooth callosities. 



Elytra at base slightly wider than pronotum near apex, twice as long as 

 wide ; sides nearly parallel from humeral angles to behind middle, then 

 arcuately converging to tips, which are separately broadly rounded; lateral 

 margins strongly serrate; basal depressions broad, deep; humeral depressions 

 broad, shallow; surface glabrous, uneven, with numerous small, irregular, 

 smooth spaces, between which the surface is densely, rather finely punctate. 

 Each elytron with four more or less distinct longitudinal costae; first distinct, 

 parallel with sutural margin, narrow and strongly elevated apically, broader 

 and more flattened basally ; the other three costae more or less distinct, sinuate, 

 and interrupted by the numerous depressed, punctured areas and smooth, ele- 

 vated spaces. 



Abdomen beneath sparsely, coarsely punctate, sparsely clothed with short, 

 recumbent, white hairs, with slightly indicated, smooth, not elevated spaces, 

 intervals vaguely granulose ; last visible sternite deeply, arcuately emarginate 

 at apex, without a submarginal ridge, lateral margins strongly serrate; eighth 

 tergite thickened at apex, sparsely, coarsely punctate, densely granulose, 

 dorsal margin deeply, angularly emarginate at apex. Prosternum coarsely, 

 densely punctate, sparsely clothed with long, semierect, white hairs; anterior 

 margin slightly rounded, without a distinct median lobe. Anterior femur with 

 a broad, obtuse tooth, which is slightly crenulate on outer margin. Anterior 



