NORTH AMERICAN BUPRESTID BEETLES 17 



Hind coxae with the posterior margin feebly sinuate or truncate, with 

 the outer posterior angle rectangular, and not prolonged 128. 



124. Male with the first and second abdominal segments longitudinally concave 



at middle, and densely clothed with long pubescence 125. 



Male with the first and second abdominal segments convex or feebly flat- 

 tened at middle, and not clothed with conspicuous pubescence 127. 



125. Posterior tarsi of male distinctly longer than tibiae ; eyes more acutely 



rounded beneath than above (107) lacustris LeConte. 



Posterior tarsi of male not longer than the tibiae 126. 



126. Prosternal lobe broadly rounded in front ; eyes about evenly rounded above 



and beneath; antennae with the outer joints (seven to eleven) not 



longer than wide (108) imbellis Crotch. 



Prosternal lobe broadly, arcuately emarginate in front ; eyes more acutely 

 rounded beneath than above; antennae with the outer joints (seven to 

 eleven) longer than wide (109) barberi Fisher. 



127. Front of head broadly, rather deeply depressed; pronotum with the mar- 



ginal and submarginal carinae separated for their entire length. 



(86) sierrae Van Dyke. 

 Front of head not broadly, deeply depressed ; pronotum with the marginal 

 and submarginal carinae not separated for their entire length. 



(110) abditits Horn. 



128. Elytra sparsely, uniformly clothed with distinct white hairs, except some- 



times in the humeral regions 129. 



Elytra not clothed with distinct white hairs 130. 



129. Prosternal lobe distinctly emarginate in front. 



(79) olentangyi Cliamplain and Knull. 

 Prosternal lobe broadly rounded or subtruncate in front. 



(Ill) pubescens Fisher. 



130. Surface above bicolored ; head and pronotum aeneous or cupreous ; elytra 



purplish black (112) pusillus (Say). 



Surface above unicolored, brownish or greenish bronze 131. 



131. Pronotum slightly narrower at base than apex, and the surface coarsely, 



transversely rugose 132. 



Pronotum equal in width at base and apex, and the surface very finely, 

 distantly, obliquely rugose (113) eleanorae Fisher. 



132. Male genitalia with the sides nearly parallel to each other. Host plant : 



Hackberry (114) celti Knull. 



Male genitalia with the sides very strongly, arcuately expanded. Host 

 plant: Black locust (115) egenus Gory. 



133. Hind coxae with the posterior margin distinctly sinuate or arcuately 



emarginate, with the outer posterior angle more or less acute, and 



somewhat prolonged 134. 



Hind coxae with the posterior margin feebly sinuate or truncate, with the 

 outer posterior angle rectangular, and not prolonged 135. 



134. Posterior tarsi of male distinctly longer than tibiae ; eyes more acutely 



rounded beneath than above (107) lacustris LeConte. 



Posterior tarsi of male not longer than the tibiae ; eyes about evenly 

 rounded above and beneath (108) imbellis Crotch. 



135. Scu ellum transversely carinate; pronotum transversely rugose and 



punctate 136. 



Scutellum not transversely carinate; pronotum very obliquely rugose, and 

 somewhat granulose (116) abstersus Horn. 



