STUDIES IN THE AMERICAN BUPRESTID^ 1 73 



Other transversely, especially in the male; in the female there is only a 

 small median part of the transverse ridge visible; they are short and 

 compact but not very stout, the third joint elongate, the outer joints in- 

 cluding the fourth, serriform but unusually convex and not much com- 

 pressed, with their lower margins obliquely though somewhat vaguely 

 and narrowly truncate, then very rapidly converging to the base, their 

 inferior surface entirely opaque from very dense punctuation and 

 each with a distinct circular sensory fossa on the oblique apical sur- 

 face, though more visible from within; the last joint in both sexes is 

 strongly and narrowly prolonged on the inner side, forming a narrow 

 process nearly as in Gyascutus. The pronotum is almost even, the 

 scutellum small but distinct, rounded and medially foveate, the elytra 

 cribrate, imperfectly and very finely striate, not distinctly serrate at 

 the sides and with the apices not at all prolonged and narrowly trun- 

 cate. The under surface is strongly convex, the presternum narrow, 

 feebly convex, not sulcate at each side and densely sculptured through- 

 out, the first ventral suture perfectly rectilinear, fine but rather dis- 

 tinct, the first segment not free, the last narrowly and evenly rounded 

 at tip, more broadly in the male. The legs are short and slender, the 

 hind tarsi three-fourths as long as the tibiae, slender, with the basal 

 joint but slightly elongate, although nearly as long as the next two 

 combined. The single type known to me may be described as fol- 

 lows: — 



Body parallel, subcylindric, scarcely shining, obscure cupreous to blackish- 

 brown, the female subglabrous, the male with short though rather 

 numerous hairs beneath and on the head, the latter evenly and deeply, 

 rather densely cribrate, more rugose in the male, the antennae about 

 a third longer than the head; prothorax a third wider than long, sub- 

 parallel, the sides feebly rounded anteriorly, becoming very broadly, 

 feebly sinuate posteriorly, the apex but little narrower than the base, 

 broadly and evenly arcuato-truncate, the base broadly, transversely 

 lobed medially, sinuate laterally, the surface gradually very deeply 

 declivious laterally, somewhat coarsely, deeply and closely cribrate 

 throughout, very feebly impressed subapically along the median line, 

 the entire posterior dorsal part of the surface very feebly impressed, so 

 that the margin at the median lobe is turned slightly upward and is 

 less punctate, sometimes also having a small sinus at the scutellum; 

 elytra but barely wider than the prothorax and about three times as 

 long, the sides parallel to apical third, there broadly rounding and 

 gradually arcuately converging to the apical truncature, which is wider 

 in the female; surface subevenly and closely cribrate, the punctures 

 not as large as those of the pronotum, also having fine and unimpressed 



