A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 



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Figure 36. — Anterior tibia of male (A), clypeus (B), and last visible abdominal 

 sternite of male (C) and of female (D) of Chrysobothris viridicyanea. 



Male. — Broadly elongate, strongly depressed above, moderately shining, bright 

 green, with a faint golden or bluish tinge in different lights ; beneath similar in 

 color to above, but more strongly shining. 



Head golden green, with a smooth longitudinal carina on occiput; front 

 slightly convex; surface coarsely, confluently punctate, sparsely clothed with 

 long, erect, inconspicuous hairs, intervals finely granulose ; clypeus broadly, 

 rather deeply, triangularly emarginate in front, arcrktely rounded on each side. 

 Antenna bronzy green, with a faint cupreous tinge, slightly narrowed to apex ; 

 intermediate segments compact, wider than long, broadly rounded at outer 

 margins ; third segment as long as following two segments united. 



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

 near apex ; sides nearly parallel along middle, arcuately converging toward 

 apex and base ; anterior margin strongly sinuate, with a distinct, broadly 

 rounded, median lobe; base strongly, angularly emarginate on each side, with 

 median lobe strongly produced and broadly rounded ; disk slightly convex, with 

 a vague median depression, but without elevated, smooth callosities; surface 

 nearly glabrous, sparsely, irregularly punctate at middle, more coarsely, con- 

 fluently punctate at sides, intervals finely, densely granulose. 



Elytra slightly wider than pronotum, nearly twice as long as wide, widest 

 hehind middle; sides slightly diverging from humeral angles to behind middle, 

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

 margins finely serrate ; basal depression very deep ; humeral depressions shallow ; 

 disk uneven, slightly convex ; surface glabrous, rather coarsely, densely punctate, 

 very irregular in places, with transverse, smooth spaces at apical third and 

 behind middle, and each elytron with a distinctly elevated, smooth costa extend- 

 ing along sutural margin from apex to middle of elytron. 



Abdomen beneath coarsely, sparsely, irregularly punctate, sparsely clothed 

 with short, recumbent, whitish hairs, without smooth lateral callosities, intervals 

 obsoletely granulose ; last visible sternite deeply, arcuately emarginate at apex, 

 without a distinct submarginal ridge, lateral margins finely serrate ; eighth tergite 

 slightly emarginate at apex, densely granulose, coarsely, sparsely punctate, but 

 not longitudinally carinate. Prosternum coarsely, confluently punctate, rather 

 densely clothed with long, semierect, whitish hairs ; anterior margin without a 

 median lobe. Anterior femur with a short, obtuse tooth, which is dentate on 

 outer margin. Anterior and middle tibiae slightly arcuate, the former with a 

 large triangular tooth at apex ; posterior tibia straight. 



Length 8.5 mm., width 3.75 mm. 



