NORTH AMERICAN BUPRESTID BEETLES 225 



Pronotum one-half wider than long, about equal in width at base 

 and apex, and widest near apical third ; sides arcuately rounded from 

 apical angles to near middle, then more strongly narrowed to the 

 posterior angles; when viewed from the side the marginal and sub- 

 marginal carinae are feebly sinuate, widely separated anteriorly, and 

 the submarginal carina becoming obsolete behind middle; anterior 

 margin rather strongly sinuate, and the median lobe broadly, arcu- 

 ately rounded ; base strongly, arcuately emarginate at middle of each 

 elytron, the median lobe broadly rounded, and subtruncate in front 

 of scutellum ; disk feebly convex, with a more or less distinct, median 

 depression in front of scutellum, a broad, moderately deep depression 

 on each side along lateral margin extending to base, and with an 

 elongate elevation in place of the prehumeral carina ; surface densely, 

 deeply rugose, the rugae more or less transverse on the disk, and 

 sparsely, finely punctate between the rugae. Scutellum moderately, 

 transversely carinate, and the surface densely, finely reticulate. 



Elytra slightly wider than pronotum at base and about equal in 

 width at base and behind middle; sides nearly parallel for a short 

 distance behind base, broadly, arcuately constricted in front of 

 middle, arcuately expanded behind middle, then obliquely narrowed 

 to the tips, which are separately, very broadly rounded and vaguely 

 serrulate; sides of abdomen narrowly exposed above; disk slightly 

 convex, sutural margins slightly elevated posteriorly and with broad, 

 moderately deep basal depressions; surface densely, finely imbricate- 

 punctate and without distinct pubescence. 



Abdomen beneath densely granulose, finely, sparsely punctate, 

 becoming transversely rugose on basal segment, and sparsely clothed 

 with short, inconspicuous hairs, which are longer and more distinct 

 along posterior margin of last segment; first segment feebly flat- 

 tened at middle, and the suture between first and second segments 

 not distinct at sides ; last segment broadly rounded at apex ; vertical 

 portions of segments not pubescent and the fourth segment longi- 

 tudinally carinate; pygidium coarsely punctate, strongly carinate, 

 but the carina not projecting. Presternum densety granulose, 

 sparsely scabrous, and nearly glabrous; prosternal lobe broad, 

 strongly declivous, and deeply, broadly, arcuately emarginate in 

 front, and the sides of the emargination forming an acute angle; 

 prosternal process broad, nearly parallel to behind coxal cavities, 

 or at most only vaguely expanded, then obliquely narrowed to the 

 apex, which is acute. Tibiae slender and the anterior and middle 

 pairs armed with a short tooth on inner margin at apex. Posterior 

 tarsi distinctly shorter than tibiae and the first joint as long as 

 the following three joints united. Tarsal claws similar on all feet, 

 cleft near middle, the inner tooth much shorter than outer one and 

 not turned inward. 



