1921] NATURAL SCIENCES OF PHILADELPHIA. 7 



Glacier Park Station, July 29, in a pine and aspen thicket. 

 Type and two paratypes in the writer's collection. 



Gnorimoschema ochreostrigella Chambers. 



This species is very common in the open meadows at the higher 

 altitudes. Many specimens collected at Granite Park and Swift- 

 current Pass, 6400 to 7100 feet; July 25-26. 



Some specimens show distinctly the ocheroua^ streaking on the 

 fore wings; in others there is scarcely a vestige of the ochreous 

 tint, and the wing is of a dull drab color, dusted with fuscous. The 

 expanse of wings varies in these specimens from 12 to 17 mm. 



Gnorimoschema triocellella Chambers. 



Glacier Park Station, Julj^ 14. In some specimens the apical 

 portion of the wing except on the extreme margins is densely dusted 

 with nearly black scales. 



Gnorimoschema erigeronella n. sp. 



Palpi white inwardly, densely dusted with black beneath and 

 outwardly ; base and a more or less distinct band near apex of second 

 segment whitish; base and extreme tip of third segment whitish. 

 Antennae whitish ochreous, banded wMth fuscous. Head and thorax 

 white, specked with black, with some ochreous on the crown, and 

 on the patagia and median line of thorax. Fore wings ochreous, 

 marked with lines of white black-barred scales, which follow the 

 veins and the margins of the wing, leaving the fold ochreous. The 

 lower margin of the cell is broadly thus clothed, and the dorsal 

 part of the wing below the fold has only a short longitudinal streak of 

 ochreous which is sometimes entirely w^anting. Around the apex 

 the scales on the interspaces are more broadly barred with black 

 than those along. the veins. An elongate black spot or dash at the 

 middle of the cell just below and in contact with the line of scales 

 along the upper margin; a similar spot at the end of the cell. These 

 are the two most distinct spots, but there is usually an aggregation 

 of blackish scales on the fold just below the first discal spot; a similar 

 spot on the ochreous ground color just within the costal margin near 

 base. Hind wings silvery gray in the female, darker in the male; 

 cilia gray with ochreous bases. Legs white, densely dusted with 

 fuscous, hind tibiae faintly barred with white; tarsal segments tipped 

 with white. Expanse, 11.5-14 mm. 



Glacier Park Station, July 28; a specimen reared emerged Aug- 

 ust 13. 



Type ( cf' ) and two paratypes ( 9 ) ; one of the females reared from 

 an irregular mine on Erigeron speciosus DC, collected July 14, 

 when most of the mines were untenanted. 



