120 The University Science Bulletin. 



material studied: Riverside, Chino, San Diego, Ontario, Visalia, 

 Tia Juana, Oroville, Caliente (Ball) ; Hamilton (no collector's 

 name) ; Los Angeles (Coquillett and A. Koebele) ; Whittier, Brawley 

 (H. 0. Osborn) ; all from California, along with a number of speci- 

 mens taken by C. F. Baker; Vera Cruz (no collector's name) along 

 with two specimens taken by Gillette and a series by Baker, all from 

 Mexico; Victoria (J. D. Mitchell), Orizaba (H. Osborn), College 

 Station (no collector's name), Brewster county (Mitchell and Cush- 

 man), all from Texas. Also a single specimen taken at Progresso, 

 Yucatan, by Frederick Knab, and one taken at Washington, D. C. 



Holotype, male, Ontario, Cal. Collection of E. D. Ball. 



Allotype, female, Ontario, Cal. Snow collection, University of 

 Kansas. 



Paratypes, male, Visalia, Cal., and female, Chino, Cal., in col- 

 lection of E. D. Ball; male, Riverside, Cal., and female, Chino, Cal.. 

 in Snow collection; male, Whittier, Cal., and female, Brawley, Cal., 

 in collection of H. 0. Osborn. 



Acinopterus inornatus (Bak.) 



(PI. VIII, figs. .3, i [type], ,'5; pi. IX, figs. 8, 9; pi. X. fig. (1; pi. XI, fig. 7; 



pi. XII, figs. 11, 12.) 



Phlepsius inornatus Bak., Psyche, vii, Suppl. i, p. 13, 1895. 



Acinopterus acuminatus var. inornatus A'an D., Cat. Heniip. N. A., p. 675, 1917. 



The following is the original description. 



Phlepsius inornatus, n. sp. Differing from all other species of the genus 

 in being entirely destitute of elytral reticulations or other markings. Length 

 of male, 6 mm. 



Male: Head narrower than the pronotum. Face a twelfth wider than long; 

 clypeus one-half longer than broad, somewhat constricted before the base, basal 

 suture strongly curved, apex slightly concave; lorae as long and two-thirds as 

 broad as clypeus; margin of gense rather slightly incur\-ed below the eye, below 

 this strongly conve.x, thence slightly incurved to tip of clypeus. Front an 

 eleventh longer than broad, somewhat less than twice the length of the 

 clypeus, broad below, the sides very slightly incurved at the antennse. Disc 

 of the vertex flat, length at middle once and a half that next the eye, width 

 between the eyes once and a half the length. Width of the pronotum two and 

 a third times the length, the length about once and two-thirds that of the 

 vertex, curvature nearly two-fifths of the length, posteriorly irregularly trans- 

 versely wrinkled. Scutellum and elytral venation normal. Plate not visible, 

 valves two and a half times longer than broad at base, slightly narrower at 

 apex, blunt at tips, without hairs. Pygofers one-half longer than valves, 

 pointed at tips, their whole outline subtriangular, provided on disc of lower 

 surface with several rather long whitish spines arranged in a single longitudinal 

 row. 



Color very pale yellowish, deeper on the abdomen. Pronotum with five 

 very indistinct longitudinal whitish bands. Elytra translucent, pale milky 



