CLEAR.WING MOTHS OF FAMILY AEGERIIDAE 75 



face white. Collar above with an erect orange brush, white at the sides and 

 beneath. Thorax metallic black, with an ill-defined whitish stripe an- 

 teriorly and a long, sordid-white brush posteriorly at the sides ; beneath 

 shiny white. Abdomen black, segments 2, 4, 6, and 7 narrowly banded 

 with clear white ; beneath segment 4 entirely white, the other segments 

 shaded with white; anal tuft short, rounded, black, slightly mixed with 

 buff at base above and at the sides, medially beneath sordid white. Legs 

 hairy, mostly white ; posterior tibiae slightly rough, anterior half mixed 

 black and white, black between the spurs, which are white ; tarsi sordid 

 white. Forewing semitransparent, clear areas with a white sheen between 

 the veins ; costa heavily and broadly scaled with black, narrow outer mar- 

 gin and fringes sordid black; discal mark conspicuous, nearly square, 

 black ; underside with costa white and a white sheen over the wing more 

 pronounced than a,bove. Hindwing transparent, a white sheen only sug- 

 gested ; outer margin narrow, violaceous-black ; the fringes, sordid white 

 at apex, blend into pure white at the wing base. 



Female. — Collar with an erect, orange brush above, which is more pro- 

 nounced than in the male. Thorax laterally striped with sordid white or 

 buff. Abdominal segments 2, 4, and 6 narrowly banded with white above 

 and beneath ; segment 5 banded with white beneath only. Posterior tibiae 

 black, sordid white at anterior spurs ; tarsi black, white at the joints. Fore- 

 w'mg nearly or quite opaque, brownish black with areas before and behind 

 discal mark, usually but not always, streaked with sordid white. Hind- 

 wing scaled with brown-black between the veins inwardly from outer mar- 

 gin to near the cell and along the inner margin to wing base. Fringes on 

 both wings brownish black. 



Expanse : Male 18 to 20 mm., female 18 to 22 mm. 



Distribution. — Colorado, Utah, Washington. 



Type. — Female. In the American Museum of Natural History. 



Remarks.—-Yiy. Edwards's description of verecunda, based on three ex- 

 amples, one male and two females from Colorado (Morrison), does not 

 discriminate between the sexes, which are dissimilar. The male type, if 

 existing, cannot be located. Two females, labeled type, are at the American 

 Museum of Natural History. Additional material, doubtfully assigned to 

 this species, consists of a small number of specimens from Colorado and 

 various Rocky Mountain regions northward to Canada. These specimens, 

 collected at random over a long period of years, are mostly in a worn con- 

 dition and lack information on food plants and habits. They are mostly 

 females and superficially similar, but structural dififerences of the male 

 genitalia indicate at least two distinct species. For conclusive determina- 

 tion, more adequate and reared series from Rocky Mountain regions are 

 needed. 



Two long series of specimens are available, which were reared from 

 the roots of Litlwspermum riideralc (Boraginaceae) in the State of Wash- 



