OF WASHINGTON, VOLUME XVIII, 1910 151 



Olethreutes piceae, new species. 



Labial palpi dusky white on the inner side, dark fuscous exteriorly. 

 Face whitish fuscous. Head and thorax dark fuscous. Forewings black- 

 ish fuscous with a greenish tint and white transverse markings as follows : 

 near base is a small diffused whitish area not clearly defined from the 

 groundcolor; on the costal edge a five geminate white dashes, the first of 

 which at basal third is continued into an undulating transverse fascia 

 the next two dashes on and beyond the middle of costa are united by a 

 similar white transverse undulating fascia, which forks just below costa. 

 The outermost geminate dash is continued into an irregular and sometimes 

 broken undulating fascia just within terminal edge, and this fascia has 

 in some specimens the tendency to fork near the costa, the fork running 

 to the penultimate geminate costal dash. Cilia fuscous with a black 

 basal line along the edge of the wing, followed by a diffused white basal line. 



Hindwings dark fuscous. Cilia fuscous with white tips and a white 

 basal line. Abdomen dark fuscous with lighter underside and anal tuft. 

 Legs blackish fuscous with narrow yellowish bars and tarsal annulations. 

 Alar expanse: 13-16 mm. 



Habitat: Colorado Springs, Colorado. 



Type: Cat. No. 20337, U. S. N. M. 



Bred during May and July in the Forest Insect Division from 

 Picea parvyana and Picea engelmanni, collected by Messrs. J. H. 

 Polloch and B. T Harvey. 



The species is allied to 0. fuscalbana Zeller and 0. campestrana 

 Zeller, but easily differentiated by the wing pattern. 



Laspeyresia populana, new species. 



Face and labial palpi light ochreous. Head ochreous with dark brown 

 side tufts. Thorax blackish with posterior tip and the tips of patagia 

 light ochreous. Forewings blackish brown with light ochreous markings; 

 basal patch dark brown, sharply angulated outwardly and strongly mot- 

 tled with ochreous on the dorsal edge; three large and three smaller ochre- 

 ous geminate dashes occupy most of the costal edge; a large ochreous spot 

 on the middle of dorsum; ocellus indicated merely by a broad transverse 

 bluish metallic streak before and after its normal place; a deep black 

 marginal line around apex and term en is broken below apex by t\vo short 

 ochreous dashes and at tornus by two broad ochreous dashes; apical part 

 of the wing finely irrorated with ochreous scales; cilia coppery brown. 

 Hindwings light fuscous with whitish cilia. Abdomen dark fuscous with 

 light ochreous underside. Legs light ochreous shaded externally \vitb 

 il.-irk fuscous. Alar expanse: 13-14 mm, 



Habitat: Missoula, Mont. 

 Foodplant: Popolus trichocarpa. 

 Type: Cat, No. 20338, U. S. N. M. 



