58 JTOCXTTIDiE. 



indistinctly dcflnccl by black, clongntc, acute at extremity ; orbicular 

 and rcniform large, the former prominent, whitish defined by black, 

 the latter defined by black on inner side, very indistinctly on outer, 

 somewhat angled inwards on median nervure ; medial shade pro- 

 minent, black, diffused, occupying most of median area ; postmedial 

 line indistinctly double, dentate and produced to black and grey 

 streaks on the veins, bent outwards below costa, incurved at discal 

 fold and below vein 4; subtcrminal line only defined by a scries of 

 dentate black marks on its inner side, angled outwards at vein 7 

 and cxcurved at middle, the area beyond it slightly whiter ; a 

 terminal series of small black lunules ; cilia chequered black and 

 whitish. Hind wing fuscous brown with a slight reddish tinge ; 

 cilia white at tips ; the underside whitish irrorated with dark 

 brown, a discoidal spot and somewhat dentate sinuous postmedial 

 line. 



Hah. U.S.A., Utah, Ogden (Snyder), 1 $ , Colorado. Exj). 3S 

 millim. 



1206. Lasionycta altaica, n. sp. (Plate LXXIX. fig. 30.) 

 Folia altaica, Bang Haas, ined. List, 47. 



5 . Head and thorax bluish white mixed with black ; tegulto 

 with medial black line ; patagia and metathorax edged with 

 black ; tarsi banded with black ; abdomen grey mixed with 

 fuscous. Fore wing bluish grey-white irrorated witb fuscous ; 

 subbasal line double, waved, black, from costa to vein 1 ; ante- 

 medial line double, the inner line less distinct, waved, angled 

 inwards on median nervure and vein 1 ; claviform short, defined 

 by black : orbicular and reniform white defined by black and witK 

 fuscous centres, the former round, the latter constricted at middle ; 

 an indistinct waved medial line oblique from costa to below cell ; 

 postmedial line dentate, bent outwards below costa, cxcurved ta 

 vein 4, then incurved, some white points beyond it on costa; 

 subterminal line white, waved, angled outwards at vein 7 and 

 cxcurved at middle ; cilia chequered fuscous and white. Hind 

 wing fuscous ; a whitish postmedial line from vein 2 to inner 

 margin ; some Avhite on termen towards tornus ; cilia white, -with a 

 fuscous line through them ; the underside whitish irrorated with 

 fuscous, a slight dark streak in base of cell, discoidal lunule, curved 

 postmedial line, and traces of a diffused subterminal band. 



JJab. W. SiBEEiA, Altai, 1 $ , type. Kvj). 42 millim. 



1207. Lasionycta arietis. (Plate LXXIX. fig. 31.) 



3Jamcsfra ariefia, Grotc, Bull. U.S. Geol. & Geog. Surv. Terr. v. p. 207 

 (1879); Smith, Cat. Noct. N. Am. p. 115. 



c? . Head and thorax white slightly mixed with fuscous ; palpi 

 and sides of frons blackish ; tegula) with slight blackish medial 

 line ; prothoracic crest blackish at base ; patagia outlined by black ; 

 tarsi with white rings ; abdomen white tinged with brown. Fore 



