” boides Michx., received from Mr. J. W. Cockle, Kaslo, B. C., 
Aug. 26,1907. The imagos appeared during the same month. 
‘The mine is large (for an underside Lithocolletis mine), oval, 
“and with a fine fold through its long axis. It closely resembles 
the mine of L. salicifoliella on poplar, but is very much larger. 
st is considerable variation in the extent of the white 
markings ; sometimes the fascia formed by the fourth pair of 
‘Streaks is interrupted, and the fascia just before the apex does 
_ Mot reach the inner margin. 
__ This species is very close to. salicifoliella in the character 
_and arrangement of markings; but may be distinguished from 
_ it by the much greater expanse, the slightly shining and more 
_.feddish ground color of the forewings, the slightly less oblique 
"position of the white streaks, and by the noticeable bluish luster 
_ Of the marginal line in the cilia. The specimens which appear 
in August are densely dusted, in this respect differing from the 
: brood of L. salicifoliella. 
Possibly this may be the species from Colorado, which Cham- 
bers doubtfully identifies as L. salicifoliella. (Cin. Quart. Jn. 
Sei. II, 302, 1875) 
> 
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