CHAMBEES ON TINEINA OF COLORADO. 131 



isli, the antennre aiiuulat:e with white, the palpi are a little darker thaa 

 the general hue, except the under surface of the second joint, which is 

 whitish. Cilia paler than the wings. Expanse of wings, scant 6 lines 

 In some lights, the fore wings appear silvery or pale golden. Taken in 

 July, among dwarf-willows, on the side of Mount Elbert. Altitude, 

 11,000 feet. 



A. pedmontella n. sp. — Resembles A. helangerella Cham, closely, and 

 possibly a larger series of specimens might connect them. Head and 

 appendages white, the antennae annulate with brown; thorax white; 

 fore wings grayish-brown above the fold, white beneath it, the white 

 sparsely sprinkled with grayish-browu, but in the apical part of the 

 wing the grayish-brown is densely dusted with white ; about the middle 

 of the dorsal margin, the white is interrupted by a slightly oblique 

 brown, nearly square spot, which extends to the fold, and is faintly out- 

 lined by whitish margins across the fold as far as the middle of the 

 wing ; there are three or four very indistinct whitish costal streaks in 

 the apical part of the wing, scarcely distinguishable from the white dust- 

 ing of that portion. A brown streak extends around the apex at the 

 base of the cilia, interrupted by two small white spots on the dorsal 

 margin, and by one on the costal margin, and with another one before 

 it. (Perhaps it would be as correct to say that a row of alternate brown 

 and white spots extends around the base of the cilia, becoming fainter 

 the farther we proceed away from the apex.) Cilia fuscous, with an in . 

 distinct whitish hinder marginal line about their middle ; hind wings 

 grayish-fuscous, with paler cilia; abdomen fuscous; legs brown on 

 their anteroir, white on their posterior surfaces. Expanse of wings, 6 

 lines. Edgerton, in July, among oaks. 



A. gcedartella f Linn. — This species was first recorded from this coun- 

 try by me on the strength of a single specimen received by me from M. 

 Belanger, taken at Quebec ; and I then noted some points in which it 

 seemed to differ from goc.darteUa as described by Mr. Staititon. I have 

 found it abundant in the mountains among willows and alders, and one 

 specimen was taken among willows on the side of Mount Elbert at an 

 altitude of about 11,000 feet. A. gcedartella feeds in Europe on birch, and 

 it is possible that the American insects which I have placed in the spe- 

 cies may belong to a new species closely allied to goedarteUa, or it may 

 be a mere variety of anducgiella. 



A. anducgiella f F. v. R. — Taken at Edgerton in July among scrub-oak. 

 In all my specimens there is a short basal streak slightly divergiDg from 

 the costa, and the second fascia is produced along the middle of the 

 apical part of the wing nearly to the apex, where it is furcate, one 

 branch going to each margin, and both branches connected by a distinct 

 golden-brown hinder marginal line around the base of the cilia, which 

 are tipped with golden brown. The first fascia is dark-margined on 

 each side, the vertex is white, and the face and palpi are pale yellow- 



