NORTH AMERICAN BL'PRESTID BEETLES 265 



Variations. — Notwithstanding the wide area over which this species 

 is distributed, there seems to be very little variation, except in color 

 and size. The color varies from olivaceous green to reddish cupre- 

 ous, and rarely a specimen is found which has a distinct bluish tinge. 

 Length 6.5 to 7.5 millimeters. The two examples from Arizona are 

 not quite typical, being slightly more slender and are only 5 milli- 

 meters in length, but agree in all other respects with the typical 

 specimens. 



Host. — Nothing is known of the larval habits of the typical form, 

 but the two specimens mentioned above from Arizona were reared 

 from " Palo verde " (Parkinsonia microphylla Torrey). Stromberg 

 (1894) and Chittenden (1900) record the adults on Honey Locust 

 (Gleditsia triacanthos Linnaeus) and Black Locust (Robinia pseu- 

 doacacia Linnaeus) but these records are probably from erroneously 

 identified specimens and are probably pseudafallaw Frost. 



This species resembles floridanus Horn very closely, but in that 

 species the sides of the prosternal process are parallel to each other 

 to behind the coxal cavities, whereas in vrnpexus the sides are ex- 

 panded behind the coxal cavities. 



91. AGRILUS CUPREONITENS, new species 



Figure 68 



Male. — Form moderately robust, subcylindrical, slightly flattened 

 above, and rather strongly shining; head aureous, with a feeble 

 cupreous tinge on the front, and becoming reddish cupreous on the 

 occiput; pronotum brownish cupreous, with a feebly greenish reflec- 

 tion; elytra reddish cupreous, and each elytron ornamented with 

 three vague pubescent spots ; beneath reddish cupreous, and strongly 

 shining. 



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

 at top and bottom, the lateral margins feebly, arcuately expanded 

 above the middle, and with a broad, moderately deep depression 

 extending from the occiput to epistoma; surface densely, finely 

 granulose, coarsely, irregularly rugose, and without distinct pubes- 

 cense ; epistoma narrow between the antennae, broadly, deeply arcu- 

 ately emarginate in front, and the clypeal suture indistinct ; antennae 

 serrate from the fifth joint (outer joints missing) ; eyes rather large, 

 broadly oval, and about equally rounded above and beneath. 



Pronotum nearly one-third wider than long, equal in width at base 

 and apex, and widest at middle; sides nearly parallel, or vaguely 

 rounded from apical angles to base ; when viewed from the side the 

 marginal and submarginal carinae are feebly sinuate, narrowly sepa- 

 rated anteriorly, and connected to each other behind the middle ; an- 



