NORTH AMERICAN BUPRESTID BEETLES 277 



and Pratt; one paratype collected May 10, 1907 at San Antonio, by 

 E. A. Schwarz ; and the following paratypes, all of which are from 

 the type locality : Four collected June 5-6, 1895, by E. A. Schwarz ; 

 three collected March-April, 1895, by C. H. T. Townsend; six col- 

 lected April-June, 1904, by H. S. Barber, and one collected February 

 24, 1909, by F. C. Pratt. 



This species is closely allied to palmacollis Horn, and is conf vised in 

 collections with that species. In prosopidis the pronotum is rather 

 coarsely, transversely rugose on the disk, the front of the head in the 

 male is bright green and not pubescent, and in the female is of a 

 bright reddish-mahogany color ; whereas in pahnacollis the pronotum 

 is finely, obliquely rugose on the disk, the front of the head in the 

 male is bronzy cupreous, and densely pubescent, and in the female 

 is dark, coppery brown. 



The specimens taken by Schwarz at Brownsville are part of the 

 material recorded by Chittenden (1900) as having been reared from 

 Mesquite (Prosojyis juliflora (Swartz) de Candolle) and Huisache 

 (Acacia fameskma (Linnaeus) Willdenow), so one of these plants 

 is probably the host plant of this species. Probably prosopidis is 

 from the Huisache as adults have been collected on this plant. 



96. AGRILUS EXIGUELLUS. new species 

 Figure 72 



Male. — Form small, moderately elongate, slightly flattened above, 

 and rather strongly shining; head dark bronzy green, becoming 

 brownish cupreous on the occiput ; pronotum and elytra dark brown, 

 with a feeble cupreous reflection, and each elytron ornamented with 

 three vague pubescent spots; beneath similar in color to above, but 

 slightly more shining. 



Head with the front rather wide, feebly convex, about equal in 

 width at bottom and top, the lateral margins nearly parallel (feebly 

 constricted near bottom), and with a vague, narrow, longitudinal 

 groove on the vertex and occiput; surface densely, finely granulose, 

 sparsely, feebly punctate, longitudinally rugose on the occiput, and 

 sparsely, uniformly clothed with short, semierect silvery white 

 pubescence; epistoma slightly transverse between the antennae, and 

 broadly, rather deeply, arcuately emarginate in front; antennae ex- 

 tending to about middle of pronotum, serrate from the fifth joint, 

 and the outer joints as wide as long; eyes rather large, broadly oval, 

 and slightly more acutely rounded beneath than above. 



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

 base and apex, and widest near middle; sides slightly arcuately 

 rounded from apical angles to behind the middle (sometimes nearly 

 parallel at middle), then more strongly narrowed to near the pos- 



