300 Teneiiia of Colorado, 



these indistinct hinder marginal lines, the first of which is about the 

 middle and the third near the tip. The wings show strong purple 

 reflections and in some lights the ocherous colors become distinctly 

 golden, but there is a considerable amount of variation in the intensity 

 and amount of the brown and ocherous hues, some specimens having 

 so large a portion of the wing strongly suffused with brown that they 

 would perhaps be best described as brownish ocherous with a pale 

 ocherous costal triangle truncate at the fold, and produced a short 

 distance back on the costa with about five brown costal spots in the 

 triangle. Al. ex. about f inches. 



The larvse folds the leaf of the bush maple (Acer, sp?) downwards^ 

 first from one side, then from the other, and then from the tip. Hab. 

 Clear Creek. Altitude as higli as 9,000 feet. 



G. ther-mopsella (n. sp.) 



This species is closely allied to G. (Parectopa) robiniella Clem., G. 

 (Paredopa) lespedegiefoliella Clem., G. saUcifolieUa Chamb. The larvse 

 and mine and larval habits are very similar to those of G. robiniella, 

 but the mine is less regularly digitate. It mines the upper surfiice of 

 the leaves of a vetch ( Thermopsis montanaf) Under surface of the body 

 white ; legs dark gray brown the tarsi annulate with white. Outer 

 surface of the second joint of the palpi dark gray brown, inner surface 

 whitish, third joint whiti.sh with a brownish annulus before the tip. 

 Head white suff'used with grayish on the vertex ; antennse dark gray 

 brown annulate with white ; thorax white ; forewings with the dor.«al 

 margin white, the remamder of the wing gray or greyish brown and 

 dark brown along the disc ; the dark brown of the disc is divided into 

 three distinct spots by three short white streaks emitted from the 

 white dorsal margin, and wdiich pass a little obliquely backwards, the 

 first placed before the middle, the second about the middle, and the 

 third behind it, and behind these three are about three white dorsal 

 spots or streaks, the last of which is just before the apex and is concave 

 towards it. In the grayish part of the wing are five white costal 

 streaks; the first of these is long and narrow, beginning about the 

 basal third of the wing length and passing obliquely backwards until 

 it almost touches the white of the dorsal margin in the apical part of 

 the wing, the second is wider and much shorter, the third shorter and 

 narrower than the second, but both oblique ; while the fourth is still 

 shorter, and is nearly perpendicular to the margin, and the fifth 

 presents a concave edge towards the apex, and is opposite to the last 

 dorsal streak, which it almost touches just before the apex, and behind 



