938 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvii. 



LYONETIA SALICIELLA Busck. 



One specimen, Juh^ 8. bred from a mine on willow much like that 

 of the preceding species. 



LEUCOPTERA PACHYSTIMELLA Busck. 



Five specimens, June 9, 29, July 11, August -1, and one from Mr. 

 Cockle's collection, July 10. They were bred from upper-surface 

 mines in the last year's leaves of the evergreen plant Pachystima 

 myrsinltes. The linear mine follows the margin of the leaf, finally 

 forming a blotch which fills the whole leaf. The frass is crowded in 

 a pack at the end. The larva emerges by a hole in the upper surface. 

 It is bright yellow, without feet. The cocoon is spun beneath silken 

 bands on the under side of another leaf. 



PHYLLOCNISTIS POPULIELLA Chambers. 



Two specimens, .Tune 12, 16, bred from mines on aspen. The mine 

 is on the back of the leaf, finally covering it entirely, but not killing 

 it. The lower epidermis only is separated, the frass in a long brown 

 line; no blotch. The cocoon occupies an enlargement of the mine in 

 a corner of the leaf and is slightly contracted. Rarely the mines 

 occurred on the upper side. 



BRACKENRIDGIA ACERIFOLIELLA Fitch. 



Four specimens, ,huie 6, and one from Mr. Cockle's collection, 

 June 6. 



INCURVARIA ^NESCENS Walsingham. 



One specimen, June 4. 



MONOPIS BIFLAVIMACULELLA Clemens. 



Thirteen specimens, July 16, 18, August 9 (South Fork Creek), and 

 two from Mr. Cockle's collection, July 7, 1901, and July 27, 1902. 



TINEOLA BISSELLIELLA Hummel. 



No specimens; one from Mr. Cockle's collection. May 27, 1902. 



TINEA PELLIONELLA Linnaeus. 



Six specimens, June 17. 30, July 12, 29 (Bear Lake Mountain), 

 August 10 (Kokanee Mountain). 



TINEA AUROPULVELLA Chambers. 



One specimen, July 23 (Frye Creek). 



