NORTH AMERICAN EUCOSMINAE. 55 



Type locality. — Oxbow, Saskatchewan. 



Food plant. — Unknown. 



Described from male type and two female paratypes from Oxbow, 

 Saskatchewan, collected by Frederick Knab (" 9-VI-07 " and 

 "5-VI-07"). 



In addition to the above I have before me specimens from the fol- 

 lowing localities : Wliite Pass, Alaska ; Aweme, Manitoba ; San Luis 

 Obispo, Los Angeles, and Inyo Counties, California. In size these 

 average about the same as the Saskatchewan and Manitoba specimens 

 although some are larger (as much as 18 mm. alar expanse). 



It is closest to parvan-a Walsingham with which it agrees very 

 closely in palpi and venation structure; but it lacks the ochreous 

 scaling which, according to Walsingham, is characteristic of his spe- 

 cies. Kearfott has determined specimens of Tnisturana as parvana, 

 tenuiana, and minimana. 



36. THIODIA PARVANA (Walsingham). 



Semasia parvana Walsingham, Illus. Lepid. Heter. Brit. Mus., vol. 4, 1879, p. 60. 

 Thiodia parvana Feknald, in Dj'ar List N. Amer. Lepid., no. 5192, 1903. — Not 



Keaefott, Can. Ent., vol. 37, 1905, p. 46. 

 Eucosma parvana Baenes and McDunnough, Check List Lepid. Bor. Amer., 



no. 7067, 1917. 



I have seen no specimen answering fully to Walsingham's descrip- 

 tion and figure. The specimens I have seen so determined by Kear- 

 fott are referable to misturana Heinrich or injiuana Heinrich. 



Alar expanse — 11.5 mm. 



Type. — In British Museum. 



Type locality. — North Oregon. 



Food plant. — Unknown. 



37. THIODIA CLAVANA (Fernald). 



(Fig. 78.) 



Semasia clavana Fernald, Trans. Amer. Ent. Soc, vol. 10, 1882, p. 72. 

 Thiodia clavana Feknald, in Dyar List N. Amer. Lepid., no. 5179, 1903. 

 Eucosma clavana Baenes and McDunnough, Check List Lepid. Bor. Amer., 

 no. 7067, 1917. 



In this species veins 3 and 4 of hind wing are either very long 

 stalked or united. 



Male genitalia figured from specimen in American Museum, from 

 Winchendon, Massachusetts ("V-26-02"). 



Distribution according to specimens in National Collection, Amer- 

 ican Museum, and collection Barnes: New York, New Hampshire, 

 Massachusetts. 



Alar expanse. — 14 mm. 



Type. — In collection Fernald. 



Type locality. — Truro, Massachusetts. 



Food plant. — Unknown. 



