352 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.46. 



hairs, the anterior ones in a more or less distinct row; hind wings 

 linear, the marginal cilia about two-thirds as long as those on fore 

 wings. 



Habitat. — Rosslyn, Virginia. 



One specimen collected October 1, 1912, by Mi\ H. L. Viereck, 

 after whom the species is named. 



Type.~C&t. No. 16045, U.S.N.M. 



