236 THE CANADIAN ENTOMOLOGIST 



Antennae purplish fuscous, annulate with ochreous. Fore wings 

 purplish brown, somewhat mixed with ochreous; rarely the ochreous 

 predominates. Beneath the fold irrorated with blackish fuscous; 

 these blackish scales are aggregated into a large spot beneath the 

 trigonal mark. Wing sprinkled with whitish or ochreous spots 

 along the fold. An indistinctly outlined trigonal spot at one- 

 third, is m.arked on the costa by a series of black spots, usually 

 two larger followed by four small ones; between the trigonal spot 

 and an elongate ochreous spot beyond, the ground colour deepens 

 on the costa to blackish fuscous. The second spot is also marked 

 on ccsta with blackish dots. Sometimes the trigonal marks are 

 obliterated by fuscous purplish ground colour which then suffuses 

 almost uniformly the entire wing. A few ochreous costal spots 

 along margin from beginning of cilia; one at extreme apex; more 

 conspicuous whitish spots along termen; sometimes irregularly 

 placed whitish dots along dorsal margin. Cilia rust red, espe- 

 cially at their bases and along termen near tornus; conspicuously 

 marked with a dark brown band which crosses in a broad curve 

 from the tips of the costal cilia to the tips of the terminal cilia just 

 beyond the tornus, almost touching the apex; tips also of the apical 

 cilia dark brown. Hind wings and cilia gray. Fore and middle 

 legs closely dusted with fuscous purple, tarsi white with black 

 tips; hind legs gray. Abdom.en gray. 



Expanse 15 mm. 



Localities. — Yosemite Valley, California; Mt. Tamalpais, 

 Marin Co., California; San Bernardino Mts., California. 



Types in author's collection. 



Three specimens, from larvae on Azalea, Rhododendron occi- 

 dentale, from Yosemite, and a series of about twenty-five captured 

 specimens. 



The larva makes a tentiform mine on the under surface of the 

 leaf, later rolling the leaf from tip down into a cone. The cocoon 

 is whitish elongate. The larvae were collected July 29, yielding 

 moths about the middle of August; the captured specimens were 

 taken July 9 to 30. 



The markings of the cilia are the most distinguishing charac- 

 teristic of this species. In some of its forms it approaches varieties 

 of G. alnivorella, from which the markings in the cilia and thickened 

 palpal segment w^ill always separate it. 



