172 BULLETIN 132, UNITIJd STATES NATIONAL. MUSEUM 



Male and female genitalia figured from specimens in National Col- 

 lection from Aweme, Manitoba (Criddle, " 13-VII-05," male) and 

 Bretton Woods, White Mountains, N. H, ("July 8-15," female). 



Bursa of female with signum. 



Distribution. — South Carolina, Pennsylvania, New Jersey, New 

 Hampshire, Maine, Ohio, Manitoba. 



Alar expanse. — 12-15 mm. 



Type. — In National Collection. 



Type locality. — Orono, Me. 



Food plant. — Spiraea salicifolia (Kearfott notes). 



6. OLETHREUTES SIDERANA CHALYBEANA (Walsingham) 

 (Fig. 427) 



Sericoris chahjbeana Walsingham, Illus. Lepid. Heter. Brit. Mus., vol. 4, 



1879, p. 34. 

 Olethreutes chalyteana Febnald, in Dyar List. N. Amer. Lepid., no. 5055, 



1903. 

 Argyroploce chahjbeana Barnes and McDunnough, Clieck List Lepid. 



Bor. Amer., no. 6833, 1917. 



In structure and- pattern Walsingham's chalyheana matches very 

 closely the typical European siderana Treitschke (fig. 426). Speci- 

 mens of the latter in the National Museum, however, are a trifle 

 different in color. The pale shade in cilia of fore and hind wings 

 is whiter in American than European specimens, the dark line at 

 base of fore wing cilia is also uninterrupted while in the European 

 specimens it is partially obliterated below apex by encroachment of 

 the pale shading of the cilia, and the yellow dusting of fore wing 

 is paler — less orange colored — than in European examples. It is 

 doubtful if such slight differences will hold consistently through 

 large series from any given locality. I have only seen three Ameri- 

 can and a half dozen European specimens, and in these they do. 

 I am therefore keeping the Walsingham name for the present, upon 

 suspicion that it may designate a distinguishable local race. Both 

 forms occur in rather high altitudes. In Europe sidera7ia feeds 

 upon Spiraea. None of the American specimens have been reared. 



Male genitalia figured from cotype in National Collection. Fe- 

 male genitalia similar to those of alhiciliana. 



Besides the cotype, we have in the National Collection a male from 

 Kaslo, British Columbia. There is also a male from Glacier Na- 

 tional Park, Mont., in the Barnes Collection, and two specimens 

 (male and female) from Kaslo in the Canadian National Collection. 



Alar expanse. — 15-16 mm. 



Type. — In British Museum. 



