NORTH AMERICAN EUCOSMIITAE. 67 



58. THIODIA PERANGUSTANA ( Walsingham) . 



Semasia peratignstana Walsingham, IUus. Lepid. Heter. Brit. Mus., vol. 4, 



1879, p. 58. 

 Thiodia perangiistana Fernald, in Dyar List N. Amer. Lepid., no. 5183, 1903. 

 Eucosma perangustana Barnes and McDunnough, Check List Lepid. Bor. 



Anier., no. 7072, 1917. 



I have seen nothing that answers satisfactorily to Walsingham's 

 description and figure. The species is keyed and placed on characters 

 given in his description. 



Veins 3 and 4 of hind wing are united. 



Alar expanse. — 15 mm. 



Type. — In British Museum. 



Type locality. — Siskiyou Mountains, North California. 



Food plant. — Unknown. 



59. THIODIA OLIVACEANA (Riley). 



(Fig. 91.) 



GraplwUtha oUvaceana Riijey, Trans. St. Louis Acad. Sci.; vol. 4, 1881, p. 320. 

 Thiodia oUvaceana Fernald, in Dyar List N. Amer. Lepid., no. 5164, 1903. 

 Eucosma oUvaceana Barnes and McDunnough, Check List Lepid. Bor. Amer., 

 no. 7061, 1917. 



Male genitalia figured from specimen in National Collection from 

 Plummer Island, Maryland (A. Busck, July, 1903). 



Distribution according to specimens in National Collection, Ameri- 

 can Museum and collection Barnes: Illinois, New Hampshire, New 

 York, New Jersey, Ehode Island, Massachusetts, Maryland, District 

 of Columbia. 



Veins 3 and 4 of hind wing stalked. 



Alar expanse. — 15-18 mm. 



Type. — In National Collection. 



Type locality. — Illinois. 



Food plant. — Solidago. 



60. THIODIA VERNIOCHREANA. new species. 

 (Fig. 95.) 



In color and pattern like oUvaceana but smaller and different in 

 genitalia. It differs also in that the fuscous dashes on costa of fore 

 wing are continuous from base to apex while in oUvaceana they are 

 only well distinguished on outer half. On the outer side of second 

 joint of the palpus there is a distinct circular fuscous spot which is 

 lacking or but faintly indicated in oUvaceana. In both species veins 

 3 and 4 of hind wing are stalked. 



Male genitalia of type figured. 



Alar expanse. — 10-13 mm. 



Type. — In American Museum. 



