OF WASHINGTON, VOLUME XII, 1910. 53 



TWO NEW AMERICAN SPECIES OF THE GENUS 



ETHMIA. 



[Lepidoptera, Ethmiidas] 

 BY AUGUST BUSCK. 



Ethmia monachella, new species. 



Labial palpi weak: second joint clothed with spreading black hairs: 

 terminal joint short, black. Face, head, and basal joint of antenna? deep 

 black; antenna- dark fuscous. Thorax deep black. Forewings with a 

 broad, longitudinal, straight-edged blackish brown streak from base to 

 apex, above which a narrow, pale yellowish costal edge and below which 

 a broad, grayish yellow dorsal streak. Around the apical edge is a regu- 

 lar series of deep black marginal dots, three of which are above the cen- 

 tral dark streak, two or three in it, and six or seven below it. In the pale 

 dorsal part of the wing are two small black dots, one at basal fourth and 

 one on the middle of the wing. Hindwings semi-transparent, smoky, 

 black, with lighter yellowish dorsal cilia. Abdomen deep black, with 

 bright orange tips to the six posterior segments and with bright orange 

 genitalia. Anterior and middle legs black, with narrow white tarsal an- 

 nulations; posterior legs black, with bright orange tibial tuft and with 

 white tarsal annulations. 



Alar expanse, 20 mm. 



Habitat: Boulder, Colorado (S. A. Rohwer, coll.). 



Type: Male, No. 12883, U. S. National Museum. 



This species belongs to the group umbrimarginella Busck 

 and allies, but is easily recognized by the light costal edge 

 above the central longitudinal dark streak. 



Ethmia hammella, new species. 



Labial palpi white, smooth. Face and head white. Antenna? yellow- 

 ish. Thorax and patagia deep bluish black with light straw-yellow 

 posterior tips. Forewings shining light straw-yellow, sprinkled with 

 bluish black scales and with deep bluish black markings; extreme base 

 and a small costal spot near base bluish black: a large quadrangular 

 bluish black dorsal spot near base ; three round spots on the disk of the 

 same color, two of which are close together, nearly confluent, near costa : 

 the third lower and farther out on the middle of the wing. The apical 

 and especially the terminal edge of the wing broadly bluish black, with 

 two small round dots preceding; beyond the upper of these, just before 

 apex, is an ill-defined blotch of white scales. Cilia yellowish fuscous. 

 Abdomen dark brown, each joint with conspicuous light ochreous pos- 

 terior edge. Hindwings blackish fuscous, darkest towards the tip, with 



