14 PROCEEDINGS OF THE ACADEMY OF [Part I 



Choreutis occidentella Dyar. 



This is one of the commonest micros in the region at altitudes 

 from 4500 to 5500 feet in moist meadows or forest openings. Speci- 

 mens taken at Glacier Park Station, July 14; Two Medicine Lake, 

 July 15-16; St. Mary, July 18; Canyon Creek, July 23. In some 

 of these specimens the small black spot with iridescent scales above 

 the large quadrate spot is absent; the ground color varies from 

 an ochreous brown to dark grayish brown. 



Choreutis balsamorrhizella Busck. 



Near Going-to-the-Sun Chalets, St. Mary Lake, July 20; flying 

 around the food plant. 



PLUTELLIDAE. 

 Plutella vanella Walsingham. 



Glacier Park Station, July 29. 

 Plutella maculipennis Ciut. 



This species was observed to be abundant in the park. 



YPONOMEUTIDAE. 

 Argyresthia oreasella Clemens. 



One specimen taken at Glacier Park Station, July 29, cannot 

 be differentiated from eastern specimens. Oak cannot be the food 

 plant here, at least, as there are no oaks here. 



COLEOPHORIDAE. 



Judging from the number collected during the short stay in the 

 park, the region is unusually rich in species of Coleophora. Twelve 

 species were collected of which ten seem to be undescribed. Of 

 these, but two are here described, the others are either represented by 

 too short series, or are not sufficiently striking in the absence of a 

 knowledge of the life history, to be described except in monographic 

 work. 



Coleophora tenuis Walsingham. 



One specimen. Two Medicine Lake, July 16, taken in dry meadows, 

 answers well the description of this species, but is slightly smaller 

 (15 mm. expanse). 



Coleophora albacostella Chambers. 



Very common, Glacier Park Station, July 14 and July 28, flying 

 amongst patches of Polygonum erectum, upon which it probably 

 feeds. Chambers' type came from Texas, which is included in the 



