June, 1902.J KeARFOTT : On NORTH AMERICAN ChOREUTES. 121 



I am glad to honor this species with the name of my friend, Mr. 

 August Busck, to whom I am under many obligations for assistance 

 and advice, and who will, in a very brief time, be known as our 

 foremost American authority on Tineidte. 



This species differs in the almost total absence of ochreous from 

 the thorax and fore wings, and in the almost uniform color of the latter. 

 The fore wing is divided almost equally into four bands, the basal and 

 second intermediate brown or black and the first intermediate and 

 marginal almost white. Its nearest ally is carduiella, and it may, 

 when the life-history is known, prove to be an extreme form of this. 

 It can be distinguished from carduiella by : ( i ) ochreous obsolete or 

 nearly so; (2) much lighter and whiter in color, and (3) whitish 

 curved line on hind wing. 



Choreutis sororculella Dyar. 



1890. Choreutis soroi'cidella Dyar, Can. Ent., Vol. XXXII, p. 86. 

 1890. Choreutis sororctdella Fernald, Can. Ent., Vol. XXXII, p. 242. 



Original description : 



" Generally similar to bjerkandrella, Thunb., but without any traces of the yel- 

 low dashes at the base of the fore wings. The pale gray space in the middle of the 

 wing is sharply limited without and within by a paler line ; in the center of this space 

 is a large group of black and metallic scales ; beyond the pale line are no black 

 scales, but a regular, distinct, subterminal metallic line ; a subcostal metallic streak in 

 basal space. Hind wings with a white dash as in onustana.^'' 



" Two examples. Placer Co., California. June (A. Koebele) ; U. S. Nat. Mus., 

 type No. 4426." 



I consider this a good species. It can be distinguished easily from 

 silpldella, gnaphaliella, etc., by the narrow whitish band next to 

 outer margin, which curves easily and evenly, slightly inwards to the 

 costa ; whereas, in silpldella, etc., this band is sharply right-angled 

 at about one-third from the costa besides broadening out into a spot. 



The basal area of front wings is uniformly light fuscous, next out- 

 wardly is a large patch of whitish; this patch only touches costa at a 

 point next to basal fuscous patch. Inside of white band along outer 

 margin are three velvety black spots, arranged in the form of a slight 

 crescent. 



Distinguishing characteristics : (i) General color pale fuscous, no 

 ochreous, (2) marginal white band slightly curved, not angled, (3) 

 velvety black spots arranged in a crescent following line of outer 

 margin. Center spot slightly larger than other two. 



