PLAGIOMIMICUS. NOCLOA. 253 



medial line and some whitish beyond the postmedial line from 

 vein 3 to inner margin ; antemedial line very indistinct, double, 

 slightly excurved from costa to median nervure, then oblique ; 

 a blackish point in middle of cell and some blackish scales on dis- 

 cocellulars ; a diffused olive-brown medial shade ; postmedial line 

 indistinct, brownish, oblique from costa to vein 7, excurved to 

 vein 4, then oblique, a dark shade beyond it on costal area ; sub- 

 terminal line faint, whitish slightly defined by brown on inner 

 side, excurved at middle ; a fine brown terminal line ; cilia brown 

 mixed with ochreous white and with ochreous line at base. Hind 

 wing white, the terminal area tinged with ochreous brown; a faint 

 brown terminal line from apex to vein 2 ; the underside with the 

 costal and terminal areas slightly irrorated with brown. 



Hab. U.S.A., Montana, Colorado, Duraugo (Oslar), 3 J , 1 ? , 

 Denver (Oslar), 2 J, 3 5 , Platte Canon. Exp. 26-34 millim. 



Genus NOCLOA. 



Type. 

 Nocloa, Smith, J. N.Y. Ent. Soc. xiv. p. 13 (1906) plagiata. 



Proboscis aborted, small ; palpi upturned, very short and slight, the 2nd 

 joint moderately fringed with scales, the .'>rd short; frons with large round 

 corneous prominence with raised edges and truncate process in middle ; eyes 

 large, round ; antennae of male almost simple ; thorax clothed chiefly with 

 scales, the prothorax without crest, the metuthorax with spreading crest, the 

 patagia slightly curled upwards at extremities; tibiaj moderately fringed with 

 hair, the fore tarsi very short and the ungues eery large ; abdomen with dorsal 

 crest at base only. Fore wing with the apex rounded, the termen evenly 

 curved and slightly crenulate, the torn us with slight scale-tooth ; veins 3 and 

 5 from near angle of cell ; G from upper angle ; 9 from 10 anastomosing with 

 8 to form the areole ; 11 from cell. Hind wing with veins 3, 4 from angle of 

 cell ; 5 obsolescent from below middle of discocellulars ; 6, 7 shortly stalked ; 

 8 anastomosing with the cell near base only. 



A. Fore wing bright yellow. 



a. Fore wing with small orange spots in cell before middle and 



at upper extremity aliaga. 



b. Fore wing without orange spots in cell. 



a 1 . Fore wing with the orbicular and reniform defined by 

 rufous. 

 a 2 . Fore wing with the postmedial line bent outwards below 



costa to near subterminal line alcandra. 



b 2 . Fore wing with the postmedial line excurved from below 



costa to vein 4 cordova. 



b l . Fore wing with the orbicular and reniform only defined 



by an irregular grey-brown patch before and below them, nanata. 



B. Fore wing rufous with blackish patches on inner margin before 



middle and on costa before apex plagiata. 



C. Fore wing dull ochreous with olive markings rivulosa. 



D. Fore wing whitish. 



a. Fore wing with olive medial band, the orbicular and reniform 



absent , n estea. 



b. Fore wing with the outer half of medial area suffused with 



red -brown, the small orbicular and reniform placed on it 



defined by black and close together arivaca. 



