STUDIES IN THE AMERICAN BUPRESTID^ 77 



valens. It is distinctly stated by LeConte that the prothorax of webbi 

 is wider at the base than at any other place, but Mr. Schaeffer seems 

 to have mistaken this to be "wider at base than at apex," which of 

 course is very evidently true of every species of the genus; I have 

 assumed, however, that in cupreo punctata the greatest thoracic width 

 is at or near the middle. I have been unable to identify insularis 

 with any species of the Biologia and conclude therefore that it is as 

 yet unrecorded in the literature of the subject; it seems to resemble 

 hirtomaculata Hbst., somewhat, but that species is described by Gory 

 as being slightly depressed, with the prothorax lightly pubescent later- 

 ally. 



Chalcophora Solier. 



Although in this genus the general habitus is wholly unlike that of 

 the preceding genera, the affinity may in reality not be so remote as 

 appears, for the two prosternal sulci are present as in Spinlhoptera, 

 though deeper and much more approximate. This and the following 

 differ from any others of the genera here considered in having the 

 epistoma more narrowed and much more abruptly and deeply emar- 

 ginate, and the supra-antennal ridge, so prominent in the preceding 

 genera, is here obsolete and replaced by a broad feeble rugose swelling 

 of the surface. The antennae in Chalcophora are slender, with elong- 

 ate and sparsely punctate outer joints, which appear to be wholly 

 devoid of sensory fossae terminal or otherwise, being the only genus 

 of this section of the family, coming under my observation, in which 

 some trace at least of terminal fossae cannot be discerned; the terminal 

 joint is evenly oval and without suspicion of apical process. The pro- 

 notum is constantly broadly though feebly sulcate, the sulcus longi- 

 tudinally divided by a slightly elevated obtuse smoother line, the 

 scutellum small, the elytra gradually narrowed behind, entire at tip, 

 not or but feebly serrulate at the sides posteriorly and with the sutural 

 angle sometimes spiniform; their sculpture is peculiarly uneven, with 

 large and finely punctate, more metallic depressions and polished lines 

 and elevations, both having a generally though unevenly longitudinal 

 arrangement. The legs are rather slender, the male tibiae without any 

 striking sexual modifications, the first ventral impressed or sulcate 

 and the basal joint of the hind tarsi at least as long as the two following 

 combined. The male modification of the abdominal apex is more 



