284 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



pronotum is feebly interrupted at the middle. The pubescence on 

 the elytra usually forms designs similar to lecontei, but frequently 

 it is partially lost by abrasion, in which case the specimen could easily 

 be mistaken for one of the species having spots on the elytra. Length 

 4 to 5.5 millimeters. 



Host. — The larval habits are unknown, but Chittenden (1900) re- 

 cords it as having been observed by H. G. Hubbard and E. A. 

 Schwarz on Arizona white oak (Quercus arizonica Sargent). 



This species is closely allied to lecontei Saunders, and quercus 

 Schaeffer. From the former it can be easily distinguished by having 

 the prosternal lobe broadly rounded in front, whereas in lecontei 

 it is deeply, arcuately emarginate. From quercus it can be separated 

 by the prosternal process being expanded behind the coxal cavities, 

 whereas in quercus the sides are parallel to each other to behind the 

 coxal cavities. The male genitalia are also different in these three 

 species. 



99. AGRILUS PSEUDOFALLAX Frost 



Figure 75 



Agrilus pseudofallax Frost, Canad. Ent., vol. 55, 1923, pp. 279-280. — 

 Knull, Ohio State Univ. Studies, vol. 2, no. 2, 1925, p. 51, pi. 1, fig. 

 15. — Chamberlin, Cat. Buprestidae, 1926, p. 79. 



Agrilus addendus Blatchley (not Crotch), Coleoptera of Indiana, 1910, 

 p. 804.— Frost and Weiss, Canad. Ent., vol. 52, 1920, p. 223.— Chamber- 

 lin, Cat. Buprestidae, 1926, p. 48 (part). (These records probably 

 refer to pseudof alias, or egeniformis) . 



Agrilus impetus Stromberg (not Horn), Canad. Ent., vol. 26, 1894, pp. 

 36-37. — Chittenden, U. S. Dept. Agric, Div. Ent., Bull. 22, new ser., 

 1900, p. 68.— Frost and Weiss, Canad. Ent., vol. 52, 1920, p. 223 — 

 Chamberlin, Cat. Buprestidae, 1926, p. 66 (part). (These records 

 probably refer to pseudofallax or egeniformis). 



Male. — Form resembling fallow, but more robust, slightly flattened 

 above, and feebly shining; head bronzy green in front, becoming 

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

 with a distinct aeneous or cupreous tinge, and each elytron ornamented 

 with three pubescent spots ; beneath brownish cupreous, and more 

 shining than above. 



Head with the front rather wide, nearly flat, slightly wider at 

 bottom than at top, the lateral margins obliquely expanded at bot- 

 tom, and feebly, arcuately expanded near middle, and with the 

 median groove only vaguely indicated on the occiput; surface finely, 

 densely granulose, sparsely, coarsely punctate, transversely rugose 

 behind epistoma, longitudinally rugose on occiput, and sparsely 

 clothed with short, semierect, silvery white hairs on the front ; epis- 

 toma scarcely transverse between the antennae, and broadly, deeply, 

 arcuately emarginate in front; antennae extending beyond middle 



