A REVISION OF NORTH AMERICAN CHRYSOBOTHRINt 151 



Figure 61. — Anterior tibia of male (A), clypeus (B), and last visible abdominal 

 sternite of male (0) and of female (D) of Clirysobothris ludificata. 



front, broadly rounded on each side. Antenna bronzy green, slightly cupreous 

 on apical segments, becoming broader toward apex; apical segments narrow, 

 twice as wide as long, broadly rounded at outer margins ; intermediate segments 

 as wide as long, subtriangular ; third segment slightly shorter than following 

 two segments united. 



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

 widest along middle ; sides nearly parallel and slightly sinuate at middle, arcuately 

 converging toward apical angles, obliquely converging toward posterior angles; 

 anterior margin broadly, arcuately emarginate, with a vague median lobe; base 

 broadly, arcuately emarginate on each side, median lobe slightly produced and 

 broadly rounded, disk slightly convex, uneven, with a broad, shallow, longi- 

 tudinal, median depression, limited on each side by a broad, smooth, elevated 

 callosity, and on each side midway between this callosity and lateral margin 

 two irregular, smooth callosities ; surface coarsely, deeply, irregularly, confluently 

 punctate, clothed with a few short, inconspicuous hairs. 



Elytra slightly wider than 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 coarsely serrate; basal depressions round and very deep; humeral de- 

 pressions elongate and moderately deep; surface glabrous, very uneven, deeply, 

 densely, coarsely punctate in depressed areas. Each elytron with four smooths 

 longitudinal costae ; first straight, strongly, elevated from apex to base ; second 

 and third irregular, broadly interrupted, joined to each other and forming 

 broad, irregular, smooth callosities; fourth barely indicated, subcrenulate, fol- 

 lowing outline of lateral margin. 



Abdomen beneath sparsely, coarsely, irregularly fossula re-punctate, more 

 densely punctate at sides of basal sternites, sparsely clothed with short, recum- 

 bent, inconspicuous hairs, without distinct lateral callosities, intervals obscurely 

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

 with a small, serrate, submarginal ridge, lateral margins coarsely serrate; 

 eighth tergite coarsely, densely punctate, with a small angular notch at apex, 

 but not longitudinally carinate. Prosternum coarsely, sparsely punctate, clothed 

 with a few inconspicuous hairs; anterior margin truncate, without a distinct 

 median lobe. Anterior femur with a short, obtusely triangular tooth, which is 

 distinctly dentate on outer margin. Anterior tibia strongly arcuate, with an 

 obtusely angulated dilation near apex and more or less constricted behind the 

 dilation; middle tibia slightly arcuate and slightly expanded toward apex'; 

 posterior tibia straight. 



Length 11 mm., width 4.25 mm. 



