A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 79 



Female. — Elongate, slightly convex above, rather strongly shining, bronzy 

 brown, with the punctures cupreous, and each elytron with four greenish-yellow 

 foveae ; beneath purplish brown, bronzy green in part, and more strongly shining 

 than above. 



Head bronzy green, becoming brownish cupreous on occiput, with a vague angu- 

 lated callosity on front and a narrow longitudinal carina on occiput; front 

 nearly flat; surface coarsely, confluently punctate, sparsely clothed with rather 

 long, erect, inconspicuous hairs; clypeus deeply, angularly emarginate in front, 

 broadly rounded on each side. Antenna uniformly brownish cupreous, distinctly 

 narrowed to apex ; intermediate segments about as wide as long, not compact, 

 broadly rounded at outer margins ; third segment as long as following two 

 segments united, with sides of segment parallel. 



Pronotum two-fifths wider than long, slightly wider at base than at apex, 

 widest at apical fourth ; sides obliquely converging on apical fourth, sinuate and 

 obliquely converging from apical fourth to posterior angles ; anterior margin 

 arcuately emarginate, without a distinct median lobe ; base arcuately emarginate 

 on each side, median lobe strongly produced, and truncate in front of scutellum ; 

 disk rather strongly convex, without callosities or depressions ; surface glabrous, 

 sparsely, finely, irregularly punctate at middle, with a few irregular, smooth 

 spaces, more densely punctate toward sides. 



Elytra slightly wider than pronotum, 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 coarsely serrate pos- 

 teriorly ; basal depressions greenish yellow, round, and deep ; humeral depressions 

 broad and very shallow ; surface glabrous, rather densely, finely punctate. 

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

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

 strongly elevated on apical half, arcuate and vaguely indicated on basal half; 

 third and fourth obsolete; with three impressed greenish-yellow foveae, one in 

 front of middle, interrupting second costa, second behind middle, interrupting 

 third costa, and third near apical third between first and second costae. 



Abdomen beneath coarsely, sparsely, irregularly punctate at middle, densely 

 punctate and densely clothed with rather long, erect hairs at sides, smooth along 

 anterior and posterior margins of sternites, and with smooth lateral callosities ; 

 basal sternites longitudinally depressed ; last visible sternite shallowly, arcuately 

 emarginate and coarsely dentate at apex, strongly, longitudinally carinate at 

 middle, depressed between tip of carina and apex, with lateral callosities strongly, 

 acutely elevated, and lateral margins strongly serrate ; eighth tergite coarsely, 

 densely punctate, apex slightly deflexed and narrowly emarginate, longitudinally 

 carinate and depressed on each side of carina. Prosternum smooth at middle, 

 coarsely punctate at sides, sparsely clothed with long, erect, inconspicuous hairs ; 

 anterior margin feebly, narrowly lobed. Anterior femur with a short, obtuse 

 tooth, which is coarsely dentate on outer margin ; posterior femur coarsely dentate 

 on outer margin. Anterior and middle tibiae arcuate ; posterior tibia straight. 



Length 17 mm., width 6.5 mm. 



Redescribed from the female lectotype, No. 2689, in the Museum of 

 Comparative Zoology, Cambridge, Mass. 



Male. — Differing from the female in having the antenna bronzy green, more or 

 less reddish cupreous, with the third segment subtriangular, the front of the 

 head without smooth callosities, the last visible sternite deeply, arcuately emarg- 

 inate at apex, but not longitudinally carinsfte, the eighth tergite sparsely punc- 

 tured, slightly notched at apex, and very densely clothed at apex with erect, 

 white hairs, and anterior and middle tibiae armed with a number of small teeth 

 on their inner margins. 



Type locality. — Laredo to Ringgold Barracks, Tex. Type simply 

 labeled with a red disk. 



