Teneina of Colorado. 303 



Lyonetia — L. alniella (u. sp.) 



This species occurs by thousands along Grand River, Clear Creek, 

 Fall River and Fontain-qui-Bouille, in all its stages, up to 9000 feet 

 altitude. The larva is gregarious, four or five being usually found in 

 a single mine. It is the only American species of the genus of -which 

 the mine is known. I am acquainted with a larva which mines the 

 leaves of the red wild plum in Kentucky, and which, I believe to be 

 that of a species of this genus, but I have never succeeded in rearing 

 the wings from it ; it makes a linear crooked mine ending in a small 

 blotch, and leaves the mine to pupate ; but all my specimens died 

 soon after leaving the mine. The mines of the European species, I 

 believe, resemble somewhat that in the Avild plum, but the mines of 

 this species are very different, they begin as a small brown blotch at 

 the side of a leaf, and frequently spread over more than one -third of 

 the surface, and it is not unusual to find " black alder" bushes Avith a 

 fourth of their leaves curled and browned by these blotches. After 

 leaving the mine its habits are those of the species already known in 

 Europe, the pupa being suspended among threads of silk spun by the 

 larva so as to slightly curl a leaf. 



Snow white ; antennae brownish, except the base ; forewings with 

 an oblique grayish brown streak about the basal fourth of the dorsal 

 margin, and another about the middle, and both pointing a little 

 obliquely backwards ; dorsal margin, along the base of the cilia, gray- 

 ish brown, ending in an oblique streak which passes down into the 

 apical part of the wing, and further back are two other small oblique 

 dorsal streaks ; beyond the middle of the costal margin are six oblique 

 grayish brown streaks, the first three pointing backwards, and the 

 others pointing forwards a little, but being nearly perpendicular to 

 the margin. Apical spot blackish, circular, with two diverging grayish 

 brown streaks behind it in the cilia. Frequently the costal and 

 dorsal streaks are small and distinctly separated, but more frequently 

 they are confluent in the apical part of the wing, which thus becomes 

 grayish brown instead of white ; the extreme costa is sometimes gray 

 brown to the base, and so is the tip of the thorax, and occasionally u 

 specimen is bred which has the entire thorax and forewings deeply 

 suffused with grayish brown. Al. ex. 5 lines. 



Phyllcenistis — P. populidla, Chatnb. 

 Common, up to more than 10,000 feet. 



