A REVISION OF NORTH AMERICAN CHRYSIOB'OTHRINI 



149 



Figueb 60. — Anterior tibia of male (A), clypeus (B), and last visible ab- 

 dominal sternite of male (C) and of female (D) of Ghrysohothris doluta. 



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

 near apex ; sides strongly, arcuately converging at apex, then slightly, obliquely 

 converging from near apex to posterior angles, which are broadly rounded; 

 anterior margin broadly, arcuately emarginate, without a distinct median lobe; 

 base transversely sinuate on each side, the median lobe slightly produced and 

 broadly rounded ; disk strongly depressed, very uneven, with two large, irregular 

 depressions on each side of middle, and a broad, elongate depression on each 

 side near lateral margin, but not longitudinally sulcate at middle; surface 

 coarsely, transversely, irregularly rugose, coarsely punctate between rugae, and 

 sparsely clothed with very long, semierect, white hairs. 



Elytra distinctly wider than pronotum, about three-fourths longer than wide; 

 sides nearly parallel from humeral angles to apical third, then arcuately con- 

 verging to tips, which are separately narrowly rounded ; lateral margins coarsely 

 serrate ; basal and humeral depressions united, forming a deep, transverse de- 

 pression ; surface glabrous, uneven ; depressed areas subopaque, densely, finely 

 scabrous, more or less rugose basally. Each elytron with the first costa slightly 

 sinuate, strongly elevated posteriorly, extending from base to apex ; second and 

 third costae broadly interrupted, more or less joined to each other by irregular, 

 elevated, smooth spaces ; fourth costa slightly elevated, following outline of lateral 

 margin. 



Abdomen beneath finely, rather densely, irregularly punctate, more coarsely 

 punctate at sides, sparsely clothed with short, recumbent hairs, broadly depressed 

 on basal segments, but without lateral callosities, intervals vaguely granulose; 

 last visible sternite with a narrow rectangular or arcuate notch at apex, arcuately 

 rounded on each side of emargination, but without a submarginal ridge, the 

 lateral margins coarsely serrate on basal halves, entire on apical halves; eighth 

 tergite slightly emarginate at apex, and finely, sparsely punctate, densely granu- 

 lose, but not longitudinally carinate. Prosternum coarsely, densely punctate, 

 sparsely clothed with moderately long, semierect, white hairs; anterior margin 

 truncate, without a median lobe. Anterior femur with a rather large, obtuse 

 tooth, which is dentate on outer margin. Anterior and middle tibiae arcuate; 

 posterior tibia straight. 



Length 12 mm., width 5 mm. 



Redescribed from the female lectotype, No. 3434, in the Academy 

 of Natural Sciences of Philadelphia. 



