156 



i orcmia fiuvliiuta Sh-pli . Cat. Br. Lep., "*'j '"•'"■ 

 Mclanippe iduala Gaen., Phal., ii. 103, 1857. 

 M, hvuppi fluctuate dim.. Thai., ii, 402, L857. 



,, v < ideata Walk., List Lep. Het. Br. >Ins.. xxv. 1296, 1862. 

 luctuata Walk., List Lep. Het. Br. Mus. sxv, 1291, L862. 



2 ' mid 2 9. — Male antennae with rather long, verj slender pectinations. 

 Wings whiter than usual. Fore wings chalky-white as a ground-color; black 

 nl base, often with some reddish-brown scales; beyond, a broad white area, 

 extending to the middle of the wing, with sometimes one or two parallel, 

 faint, dark lines; the median hand is twice or three times as wide on the costa 

 ;is on the inner edge, and often more or less obsolete behind the median vein, 

 where it is made up often of three large ringlets; anteriorly it is either rather 

 heavy and blackish, with the discal dot not apparent, or it is pale in the 

 middle, with the discal dot distinct (this band has sometimes a distinct red- 

 dish-brown tinge); beyond this median band is a broad, clear, whitish band 

 extending to the costa; beyond its costal end is a large, square, black patch; 

 interrupted by one or two white lines, which run in a zigzag course across 

 die wing; below this patch, in the outer part of the extradiscal space, is a 

 smaller black patch, filling two of the scallops of the submarginal, clear, 

 zigzag line; the marginal row of black dots in both wings is smaller and 

 isolated, compared with most of the allied species. Hind wings whitish, with 

 four or rive dusky lines and a discal dot. 



Length of body, S , 0.40, 9, 0.35; of lore wing, S , 0.50-0.60, 9, 0.52; 

 expanse of wings, 1.00-1.15 inches 



Caribou Island, Labrador, July 17 (Packard); White Mountains, New 

 Hampshire (Shurtleff); Mount Washington, New Hampshire, July (Morri- 

 son); Treat's Island, Eastport, Me., .Inly 16 (Shurtleff); Ithaca, N. Y. (Smith): 

 Philadelphia, Pa. (Amer. Ent. Soc). 



This species also occurs in Europe, Asia Minor, America, and the Altai 

 Mountains. 



Differs from the allied species by the well-pectinated antennas, the chalky- 

 white wings, thi' form of the dark, distinct median band, often obsolete or 

 very narrow behind, and in the costo-apical black patch. In the Labrador 

 and one' \\ hite Mountain (fig. 72) examples, the basal spot and median band 

 have ii derided reddish-brown tinge, while those from the Middle States are 

 pure blackish, and much as in the European examples received from the Vienna 

 Museum. The single Labrador .specimen (expanse of wings, 1.15 inches) is 

 much larger than any of the others, and agrees in size with the European 



