NORTH AMERICAN BUPRESTID BEETLES 311 



frequently longitudinally concave and pubescent similar to locust, is. 

 Length 3.75 to 5.5 millimeters. 



Host. — The larval habits are unknown but the adults have been 

 collected a number of times by different collectors on Frostweed (Hel- 

 Mnthemum canadensis (Linnaeus) Michaux.). Chamberlin (1926) 

 records it as having been reared from yellow locust {Robinia pseu- 

 doacacia Linnaeus), but this record probably refers to egenus Gory, 

 a very closely allied species which breeds in that tree. 



This species is closely allied to lacusPns LeConte, but in that 

 species the posterior tarsi of the males are distinctly longer than the 

 tibiae, the eyes are usually more acutely rounded beneath, the 

 pubescence on the elytra is usually scarcely visible, and frequently 

 the pronotum is obsoletely depressed at the middle. From the 

 records available, imbellis seems to be confined to the Atlantic States, 

 from Massachusetts to Alabama, and lacustris to the Middle West, 

 extending from Lake Superior to Texas, and westward to southern 

 California. Horn (1891) separates this species from lacustris on 

 the first two ventral segments of the male being flattened and without 

 pubescence, but on examining the type of imbellis, these segments 

 were found to be longitudinally concave, and the pubescence was 

 also as long as in lacustris. 



109. AGRILUS BARBERI, new species 



Figure 85 



Male. — Form moderately elongate, slightly flattened, moderately 

 shining, and bronzy green, with a more or less distinct aureous or 

 cupreous tinge; beneath similar in color to above, but more shining. 



Head with the front broad, nearly flat, about equal in width at 

 top and bottom, the sides nearly parallel to each other, and with a 

 narrow, median groove extending from occiput to vertex; surface 

 finely scabrous, more or less rugose, finely punctate, and rather 

 densely clothed with long, recumbent, white hairs; epistoma trans- 

 verse between the antennae, broadly, deeply, arcuately emarginate, 

 in front, and the clypeal suture distinct; antennae extending to 

 middle of pronotum, serrate from the fifth joint, and the outer 

 joints longer than wide ; eyes moderately large, rather broadly oval, 

 and slightly more acutely rounded beneath than above. 



Pronotum about one-fourth wider than long, slightly wider at 

 apex than base, and widest at apical angles; sides feebly, obliquely 

 narrowed from apical angles to posterior angles, which are rec- 

 tangular; when viewed from the side the marginal carina is strongly 

 sinuate, the submarginal carina nearly straight, the two carinae 

 narrowly separated anteriorly, and connected to each other behind 

 the middle; anterior margin, strongly sinuate, and the median lobe 



