EUXOA. 303 



apex. Hind wing whitish, strongly tinged with brown especially 

 on terminal area, the veins brown ; cilia white, with a brown line at 

 base ; the underside with the costal and terminal areas irrorated with 

 brown, a discoidal point. 



Hah. U.S.A., Montana, Colorado, California, Havilah, 5 $ type, 

 Grote Coll., Arizona. Exi). 40 millim. 



539. Euxoa silens. (Plate LXVI. fig. 20.) 



Agrotis silens, Grote, Can. Ent. vii. p. 67 (1875) ; Smith, Cat. Noct. N. 

 Am. p. 107. 



(5^ . Head, thorax, and abdomen grey, mixed with dark brown. 

 Fore wing grey, strongly irrorated with brown ; a blackish fascia 

 below the cell from base to middle of wing, but less distinct towards 

 its extremity ; the subbasal, antemedial, and postmedial lines 

 obsolete ; the orbicular and reniform grey, defined by blackish, the 

 former elongate, elliptical, the latter moderate, the cell before and 

 between the stigmata reddish brown ; the veins of terminal area 

 streaked with brown ; the subterminal line grey, very indistinct, 

 excnrved, and Avith a series of dentate brown marks before it at 

 middle ; a terminal series of black points. Hind wing white, tinged 

 with brown towards margins, the veins brown ; the underside with 

 the costal area slightly irrorated with brown. 



Eab. IJ.S.A., Nevada, 1 6 type. Exjj. 40 millim. 



*540. Euxoa silenis. (Plate LXVI. fig. 21.) 

 Carneades silcnis. Smith, Pr. U.S. Nat. Mus. xxii. p. 459 (1900). 



$ . Ashen grey on a slight ochreous ground-colour ; base of frons 

 and tegulse ochreous, the latter with black medial line and grej' tips ; 

 patagia edged with black ; thorax clothed with scales and hair, the 

 costa well developed. Fore wing with the lines indistinct ; sub- 

 basal line double, barely traceable ; a slight black streak below base 

 of cell ; antemedial line double, oblique, excurved in interspaces ; 

 claviform long, slender, incompletely defined by black ; orbicular 

 small, elliptical, with pale annulus defined by black ; reniform small, 

 with fuscous centre and yellowish annulus defined by black ; the 

 cell fuscous before and between the stigmata ; postmedial line 

 distinct at costa, then obsolescent, bent outwards below costa, ex- 

 curved to vein 4, then oblique ; subterminal line distinct, yellowish, 

 angled outwards at vein 7 and excurved at middle, defined on 

 inner side by a dark spot on costa, then by a somewhat dentate 

 shade, the area beyond it fuscous ; a terminal series of dark lunules • 

 cilia yellowish at base, and with dark medial line intersected Avith 

 white. Hind wing white, the terminal area rather broadly tinged 

 with fuscous; the underside with the costal area irrorated with 

 fuscous. 



Hah. U.S.A., California, Los Angelos (Coquillet). Exp. 31 

 millim. This species is unknown to me ; figured from a photograph 

 from type in U.S. Nat. Mus. 



