CLEAR-WING MOTHS OF FAMILY AEGERIIDAE 171 



and conspicuous, triangular discal mark black; fringes blackish brown; 

 underside same as above. Hindwing of the same color, but increasingly 

 more dusky toward the margins ; inner margin basally broadly black ; 

 discal mark ovate, black ; fringes blackish brown ; underside same as 

 above. 



Female. — Antennae simple, black. Head and thorax less hairy, black, 

 not mixed with white hair. Abdomen with segments 2, 4, and 6 banded 

 with white, most broadly on segment 4; anal tuft short, blunt. Wings 

 more uniformly colored, bright red or orange ; black costa and margins 

 narrower and clearly defined ; discal mark reduced in size. Otherwise 

 like the male. 



Expanse: Male 20 to 26 mm., female 20 to 26 mm. 



Distribution. — Nebraska, South Dakota, Colorado, Utah, New Mexico. 



Type. — Male. In the Museum of Comparative Zoology. From 

 Nebraska. 



Remarks. — Records in the United States National Museum : Chimney 

 Gulch and Turkey Creek Canyon, Colo., 6,000 feet, October 2-19, 

 1921-1922, long series both sexes (E. J. Oslar) ; Berkeley, Colo., October 

 16-23, males and females ; Plains, Larimer County, Colo., two males 

 (C. F. Baker) ; Loveland, Colo., males and females (Paul Schlarbaum) ; 

 Buffalo Valley, Stanley County, S. Dak., 2 females (W. H. Over) ; Stock- 

 ton, Utah, October 16-18, 1909, male and female (Tom Spaulding) ; 

 Koehler Junction, N. Mex., October 6-15, 1913, two males (E. R. Kalm- 

 bach) ; Springer, N. Mex., one male (C. N. Ainslie) ; Las Vegas, N. 

 Mex., October 5, one female (Cockerell). 



EUHAGENA NEBRASKAE MORMONI, new form 



Plate 29, Figure 171 



Male. — Forewing semitranslucent, with pearly-white scales, slightly 

 mixed with orange ; costa, outer margin, and cubitus black ; inner margin 

 thinly edged with orange ; discal mark conspicuous black ; fringes blackish 

 brown ; underside heavily dusted with cream white, except for black discal 

 mark. Hindwing flushed with orange between and on the veins, most 

 densely along inner margin ; discal mark black, edged with orange on 

 the sides; margins narrow, black; fringes black-brown, whitish basally. 

 Abdomen black, segment 4 broadly banded with pale yellow above and 

 beneath, segments 6 and 7 banded with pale yellow only above and at 

 the sides. Otherwise like typical nebraskae. 



Expanse: Male, 31 mm. 



Distribution. — Logan, Utah. 



Type.— \J. S.N. M. No. 56849. 



Remarks. — Only two male examples of this striking form of nebraskae 

 are known. They are labeled "Logan, Utah, September 20, 1923, W. W, 

 Henderson, collector," 



