150 NOCTUIDJi. 



yellowish white faintly tinged with red-brown, a faint curved post- 

 medial line. 



Ab. 1. Paler and less red.— Manitoba, Alberta. 



Hah. Canada, Renfrew Co., 7 6 •, Manitoba, Winnipeg, 2 <3 , 

 Alberta, Calgary ( Wolley-Dod), 1 J 1 , 4 $ ; U.S.A., Massachusetts, 

 New York, Evans Center, 2 tf type, New Jersey, Utah, Colorado. 

 Exp. 24-40 millim. 



Larva. Dyar, Pr. U.S. Nat. Mus. xxvii. p. 874 (1904). 



Head rounded, disk-like, yellowish white, white on face which is 

 edged by a heavy semicircular black band, jaws and sutures of 

 mouth black ; body Flattened ventrally, somite 12 not enlarged ; 

 translucent green ; a broad dorsal white band on somites 3 to 13, 

 narrowing in front; thoracic shield green, not cornihed ; narrow 

 subdorsal and substigmatal white lines ; legs tipped with black ; 

 tubercles small, pale, white with dark hair points, iv. at the lower 

 corner of spiracles which are white edged with black ; skin 

 shagreened. Food-plant : Aspen, living in a dwelling formed of 

 the leaves with a hole at the lower end. 



4493. Ipimorpha subvexa. (Plate CXLI. fig. 8.) 



Ipimorpha subvexa, Grote, Can. Ent. viii. p. 189 (1876); Smith, Oat. Noct. 

 N. Am. p. 212. 



cj . Head, thorax, and abdomen reddish brown mixed with grey ; 

 antennae with the basal joint white, the shaft ringed with whitish; 

 pectus mixed with whitish ; abdomen with the anal tuft tinged 

 with rufous, the ventral surface whitish. Fore wing grey thickly 

 irrorated with olive-brown ; subbasal line whitish, slightly angled 

 inwards on median nervure and ending at submedian fold ; ante- 

 medial line brown defined by pale yellow on inner side, oblique and 

 slightly excurved at median nervure ; claviform very small, brown 

 slightly defined by whitish ; orbicular and reniform brown defined 

 by whitish, the former small, elliptical, the latter large and con- 

 stricted at middle ; a slight brown medial shade from lower angle 

 of cell to inner margin ; postmedial line brown defined by pale 

 yellow on outer side, obliquely curved from costa to discal fold, then 

 straight, oblique ; subterminal line indistinct, whitish, defined on 

 inner side by olive-brown suffusion, excurved below vein 7 and at 

 middle, angled inwards at discal and submedian folds and bent 

 outwards to tornus ; a terminal series of small brown lunules ; 

 cilia brown with slight pale line at base and whitish tips. Hind 

 wing whitish suffused with brown except on costal area; cilia 

 ochreous white with a brown line through them ; the underside 

 ochreous white, the costal area irrorated with brown, a brown 

 postmedial line from costa to discal fold. 



Hah. U.S.A., Texas (Belfrage), 1 d type, Colorado. Exp. 

 42 millim. 



