322 BULLETIN 145, UNITED STATES NATIONAL MUSEUM 



with a vague emargination at middle ; prosternal process broad, the 

 sides nearly parallel to behirid the coxal cavities, then abruptly nar- 

 rowed to the apex, which is acute. Posterior coxae with the posterior 

 margin transversely truncate externally, the exterior angle rectang- 

 ular, and not prolonged. Tibiae slender, straight, and the anterior 

 and middle pairs armed with a small tooth on inner margin at apex. 

 Posterior tarsi slightly shorter than tibiae, and the first joint as long 

 as the following three joints united. Tarsal claws similar on all feet, 

 cleft near the middle, the inner tooth broad, shorter than outer one, 

 and not turned inward. 



Length, 4.50 mm. ; width, 1.13 mm. 



Female. — Unknown. 



Type locality.- — Devil's River, Tex. 



Type and paratype— Oat. No. 41016, U.S.N.M. 



Described from two males (one type), collected at the type locality, 

 May 2, 1907, on Pithecolobiwn sp., by E. A. Schwarz. 



This species resembles celti Knull and egenus Gory very closely, 

 but can be separated from both these species by being a uniform 

 brownish cupreous color, the pronotum nearly subequal in width and 

 length, with the lateral margins nearly straight, and the surface very 

 finely, distantly, and obliquely rugose, and the male with the median 

 lobe of the genitalia strongly expanded and broadly subtruncate at 

 the apex. 



This species is named in honor of Miss Eleanor T. Armstrong, who 

 has made considerable biological studies of some of the species of 

 this genus in California, and who has also made the drawings for 

 the present paper. 



114. AGRILUS CELTI Knull 



Figure 89 



Agrilus celti Knull, Ent. News, vol. 31, 1920, pp. 11-12. — Frost and Weiss, 

 Canad. Ent., vol. 52, 1920, p. 223.— Nicolay, Journ. N. Y. Ent. Soc, vol. 

 29, 1921, p. 175.— Knull, Canad. Ent., vol. 54, 1922, p. 85.— Champlain 

 and Knull, Ent. News, vol. 34, 1923, p. 85, fig. 1.— Knull, Ohio State 

 Univ. Studies, vol. 2, no. 2, 1925, pp. 52-53, pi. 1, fig. 1. — Chambeblin, 

 Cat. Buprestidae, 1926, p. 56. 



Agrilus egenus Hopkins, (not Gory), Insect Life, vol. 4, 1892, p. 259. 



Male. — Form moderately elongate, similar to egenus, feebly shin- 

 ing, uniformly brownish or greenish bronze, except the head, which is 

 light green, with a feeble aeneous tinge ; beneath green, with a strong 

 aeneo-cupreous tinge, and more shining than above. 



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

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

 middle, and with a feeble, narrow longitudinal groove on the vertex 

 and occiput; surface densely, coarsely granulose on the front, with 



