58 NOCTTTIDJE. 



indistinctly defined by black, elongate, acute at extremity ; orbicular 

 and renit'orm 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, diff'used, 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 ; subterminal line only defined by a series of 

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

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

 terminal series of small black lunules ; cilia chequered black and 

 whitish. Hind Aving 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. 



Ilal. U.S.A., rtah, Ogden (Snyder), 1 $ , Colorado. £".175. 38 

 millim. 



120G. Lasionycta altaica, n. sp. (Plate LXXIX. fig. 30.) 

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



2 . Head and thorax bluish white mixed with black ; teguloe 

 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 with 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 Avith 

 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, excurved to 

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

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

 excurved at middle ; cilia chequered fuscous and white. Hind 

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

 margin ; some white on ternien towards tornus ; cilia white, with a 

 fuscous line through them; the imderside whitish irrorated with 

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

 postmedial line, and traces of a diff'used subterminal band. 



Eah. W. SiBUKiA, Altai, 1 $ , type. Exj}. 42 millim. 



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



JSIamcsfra arietis, Grote, EiiU. U.S. Geol. & Gcog. Surv. Terr. v. p. 207 

 (1871)); Smith, Cat. Noct. N. Am. p. 115. 



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

 and sides of frons blackish ; teguho with slight blackish medial 

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

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



