NORTH AMERICAN BUPRESTID BEETLES 51 



Male. — Form resembling angelicus, feebly shining, and slightly 

 flattened above; head aeneous or greenish, becoming feebly brownish 

 on occiput; pronotum aeneous or aureous, becoming broadly reddish 

 cupreous on the disk; elytra brownish aeneous, rarely with a feeble 

 dipreous reflection; beneath aeneous, with a distinct cupreous tinge, 

 and more shining than above. 



Head with the front wide, feebly convex, vaguely wider at top than 

 bottom, the lateral margins feebly expanded from bottom to top, 

 usually with a narrow longitudinal groove extending from occiput 

 to middle of front, and with a broad, vague depression behind the 

 epistoma; surface finely, densely granulose, coarsely but not deeply, 

 irregularly rugose, the rugae more or less longitudinal on occiput, 

 sparsely, coarsely punctate between the rugae, and sparsely clothed 

 with short, semierect hairs, which are longer behind the epistoma; 

 epistoma strongly transverse between the antennae, strongly elevated, 

 and with a deep, arcuate emargination in front; antennae extending 

 to middle of pronotum, serrate from the fourth joint, and the outer 

 joints as wide as long; eyes large, elongate, and vaguely more 

 broadly rounded above than beneath. 



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

 and apex, and widest near middle; sides feebly arcuately rounded 

 from apical angles to behind middle, then more strongly narrowed to 

 the posterior angles, which are rectangular; when viewed from the 

 side the marginal and submarginal carinae are feebly sinuate or 

 nearly straight, widely separated anteriorly, and connected to each 

 other near base; anterior margin distinctly sinuate, with a feeble, 

 broadly rounded, median lobe: base broadly, arcuately emarginate 

 at middle of each elytron, the median lobe feebly, broadly rounded, 

 and subtruncate in front of scutellum; disk moderately convex, a 

 broad, vague, anterior and posterior median depression, a broad 

 moderately deep depression on each side along lateral margin, and 

 with very sharply defined, short prehumeral carinae; surface densely 

 granulose, densely, rather deeply, transversely rugose, finely, sparsely 

 punctate between the rugae, and without distinct pubescence. Scu- 

 tellum strongly, 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 or feebly 

 sinuate for a short distance behind base, feebly, broadly constricted 

 in front of middle, broadly, arcuately expanded behind middle, then 

 obliquely narrowed to the tips, which are separately, broadly 

 rounded, and finely serrulate; sides of abdomen narrowly exposed 

 above; disk feebly flattened, without longitudinal costae, sutural 

 margins slightly elevated behind middle, and with broad, deep, basal 



