46 MISC. PUBLICATION 4 7 0, V. S. DEPT. OF AGRICULTURE 



even, without depressions or smooth callosities, except for a smooth, triangular 

 space. on each side at base in front of elytral lobe, and a vague, smooth line 

 in front of scutellum ; surface coarsely, confluently punctate, finely granulose 

 between punctures, rather densely clothed with long, recumbent, white hairs. 



Elytra at base slightly wider than pronotum near middle, nearly twice as 

 long as wide ; sides parallel from humeral angles to behind middle, then 

 arcuately converging to tips, which are separately broadly rounded; lateral 

 margins coarsely serrate posteriorly ; basal depressions broad and rather deep ; 

 humeral depressions elongate and shallow ; surface coarsely, densely, scabrously 

 punctate, rather densely clothed with short, semierect, white hairs. Each elytron 

 with four distinct, more or less smooth, longitudinal lines; first parallel with 

 sutural margin, extending from apex to basal fovea ; second sinuate, extending 

 from near base to apex ; third short, extending backward from basal third and 

 connected to second line near apical third ; and fourth following outline of 

 lateral margin, but without distinct discal foveae. 



Abdomen beneath finely, densely punctate, rather densely clothed with mod- 

 erately long, recumbent, white hairs, and white efflorescence, without lateral 

 callosities; last visible sternite broadly, arcuately emarginate at apex, without 

 a submarginal ridge, lateral margins coarsely serrate; eighth tergite slightly, 

 broadly emarginate at apex, densely, coarsely punctate, but not longitudinally 

 carinate. Prosternum coarsely, confluently punctate, finely granulose, rather 

 densely clothed with long, semierect, white hairs ; anterior margin slightly de- 

 flexed, with a wide, short, median lobe. Anterior femur with a large, acutely 

 triangular tooth, which is coarsely dentate on outer margin. Anterior and 

 middle tibiae slightly arcuate, the former with a long, indistinct dilation near 

 apex; posterior tibia straight. 



Length 9 mm., width 3.5 mm. 



Female. — Differing from the male in having the head brownish cupreous 

 and more sparsely pubescent, the antenna brownish cupreous, slightly narrowed 

 to apex, and the third segment distinctly longer than fourth, the last visible 

 sternite broadly, transversely sinuate at apex, the eighth tergite broadly rounded 

 at apex, and more densely punctured, the middle tibia straight, and the anterior 

 tibia unarmed near apex. Length 11 mm., width 4 mm. 



Type locality. — Death Valley, Calif. 



Type material. — Type and allotype in the United States National 

 Museum, No. 55292. Paratypes in the collection of William F. Barr. 



Described from four specimens (one type). The type and allotype 

 were cut from the heartwood of the desertholly {Atriplex hy- 

 menelytra (Torrey) Watson) by M. French Gilman^ who reports 

 them rather numerous in the branches of the holly, in some cases 

 killing the plant; and two paratypes (which are not quite typical) 

 collected by W. F. Barr, one at Thermal, Riverside County, Calif., 

 June 18, 1940, and the other one at San Felipe Creek, Imperial 

 County, Calif., June 17, 1940. 



This species is closely allied to deserta Horn, but it differs from that 

 species in having the upper surface of the body bronzy green, with 

 a distinct cupreous tinge, the anterior tibia of the male not armed 

 with a distinct dilation near the apex, and the sides of the male geni- 

 talia slightly, arcuately rounded, and not constricted toward the apex. 



There are three specimens in the United States National Museum 

 collected by H. F. Wickham during June at Hawthorn, Nev., which 

 resemble this species but are not entirely typical. These specimens 

 are smaller, more slender, and darker in color, and the pronotum is 

 more coarsely punctured and has more or less distinct callosities. 

 The anterior "tibia of the male is like that of atriplexae, but the geni- 

 talia are slightly different. Since so few specimens are available at 

 present, they are placed temporarily under this species, but may 

 prove to be a distinct species when more material is available for 

 study. 



