124 BULLETIN 85, UNITED STATES NATIONAL MUSEUM. 



head often whitish or light brown with ventral surface of genal 

 cones dark brown, or else uniformly brown to dark brown; thoracic 

 dorsum very light to dark brown, more or less variegated; abdomen, 

 venter, pleurae of thorax, and legs usually distinctly darker, often 

 very dark; forewings variable, either very light with small brown 

 spots scattered over apical half or often the entire surface, or with 

 these spots aggregated into a large irregular apical macula and another 

 just below middle of wing, more or less separated, often with these 

 maculae very dark and more regular in outUne and more distinctly 

 separated by a transparent band. Body surface and wings often 

 covered with a white powder which lends a whiter color to the insect 

 and covers more or less the brown areas; very often the body and 

 wings are glabrous without any powder or with only a slight amount. 

 The latter are uniformly darker in general color. All these characters 

 vary widely but gradually in a large series. Body rather small, but 

 robust. 



Head more or less deflexed, often almost vertical, sometimes less 

 so, almost or quite as broad as thorax, punctate, often pulverulent; 

 vertex large, broad, with a deep fovea on each side of median line 

 discally, rounded and full on each side anteriorly, postocellar regions 

 somewhat elevated. Genal cones rather large in comparison to 

 some of its congenors, occasionally very large, broad at base, broadly 

 rounded at apex or sometimes more narrowly rounded, more or less 

 divergent, depressed below plane of vertex, briefly, pubescent. 

 Antennae slender, about twice as long as width of head, or shorter, 

 black apically. 



Thorax broad, robust, strongly arched, often pulverulent, punctate. 

 Pronotum rather long, more or less flat, with lateral enlargement 

 medium to small in size; propleurites rather short. Wings relati ,^ely 

 rather small, subhyaline, variously maculated as described above, 

 often pulverulent, a little more than twice as long as broad, broadly 

 rounded at apex; first marginal cell larger than second; pterostigma 

 very small. 



Genitalia. — Male. — Genital segment large; forceps slender, rather 

 long, arched, cultrate, acute at apex; anal valve long, broadly ovate 

 when viewed from behind, rounded acutely at apex. Female. — ■ 

 Genital segment not quite as long as rest of abdomen, acute; dorsal 

 valve a little longer than ventral and less acute, with a tuft of long 

 hairs midway on dorsal surface. 



Described from over one hundred specimens of both sexes from 

 the following locahties: Colorado (C. F. Baker), mostly dark forms; 

 Santa Rita Mountains, Arizona (Hubbard and Schwarz), June; 

 Flagstaff, Arizona (Barber and Schwarz), July; Williams, Arizona 

 (H. S. Barber), July; Chiricahua Mountains, Arizona (Hubbard), 

 June, on Ceanoihus fendleri (most of these are lighter forms) ; Placer 



