CLEAR-WING MOTHS OF FAMILY AEGERIIDAE 169 



August 10, 1920, and Platte Canyon, Colo., 8,000 feet, August 8, 1920. 

 The Colorado specimens conform with Hy. Edwards's description of the 

 male type. All the males from Midwestern and Eastern states differ 

 from the type of fraxini in having two conspicuous vitreous areas, one 

 before and one behind the discal mark. The name fraxini form vitriosa 

 applies to these males. The females exhibit no such distinctions. 



ALBUNA FRAXINI VITRIOSA, new male form 



Male. — Forewing broadly margined with black ; a hyaline area traversed 

 by black veins between outer margin and discal mark, and a long hyaline 

 area, crossed by the black cubitus, extending to wing base; discal mark 

 broad, black, red spotted on outer edge. Thorax black, tegulae with a 

 faint yellowish stripe inwardly and mixed with whitish hair laterally. 

 Otherwise like the type of fraxini. 



Female. — Like that of fraxini. 



Expanse : Same as for fraxini. 



Distribufion. — Illinois, Indiana, Kansas, Missouri, Pennsylvania, New 

 Jersey, New York. 



Type.— U.S.N. M. No. 56848. From Chicago, 111. 



Remarks. — Described from male type, female allotype, and four female 

 paratypes from the type locality ; three male and two female paratypes 

 from Willow Springs, 111. ; one male paratype from Oconee, 111. ; one 

 male paratype from Riley County, Kans. ; one male paralype from Onaga, 

 Kans., one female paratype from Devils Lake, Wis. ; one male paratype 

 from Squaw Run, Allegheny County, Pa. ; and one male paratype from 

 Ogdensburg, N. J. ; all in the United States National Museum. 



Genus EUHAGENA Hy. Edwards 



Euhagena Hy. Edwards, Papilio, vol. 1, p. 180, 1881. (Genotype, Euhagena nehraskae 

 Hy. Edwards.) 



Wing and genitalia characters as in Paranthrene except that veins 3 

 and 4 of hindwing are more closely approximate, nearly connate, than 

 in that genus. Differs from Paranthrene also in the hair of the labial 

 palpi being very long ; in the strongly hairy, not scaled, head and thorax ; 

 in the male antennae having much longer appressed bipectinations ; and 

 in the aborted nonfunctioning tongue. 



The excessive hairiness of the species of Euhagena seems explainable 

 by the late season of emergence of the moths, principally during October 

 and sometimes as late as November. At that time frosty nights prevail 

 in their mountainous habitats. Ernest J. Oslar, of Denver, Colo., sub- 

 mitted over 100 specimens of E. nehraskae in 1922, collected in Turkey 

 Creek Canyon and in Chimney Gulch near Golden, Colo., elevation about 

 6,000 feet, in the fall of that year and of the previous year. He reported 

 the species locally common, the moths in flight or resting on foliage in 

 weedy places. As to the food plant he utterly failed to find a clue. I also 



