318 KOCTlTIDiE. 



562. Euxoa difficilis. 



Agrotis difficilis, Ersch. Hor. Soc. Ent. Eoss. xii. p. 337 (1877); id. Eom. 



Mem. ii. pi. 16. f. 5 ; Staud. Cat. Lep. pn.1. p. 151. 

 Aqrotis cdbivcnata, Staud. Iris, t. p. 359, pi. 3. f. 4 (1892). 

 Agrotis alphcraJcii, Christ. Iris, vi. p. 91 (1893). 



S . Head and thorax brown mixed Avith grey ; tegulse with the 

 basal half j'ellowish white, with a line of blackish scales near base ; 

 abdomen grey-brown. Pore wing brown, largely suffused and 

 irrorated with fuscous ; the costal area yellowish white slightly 

 irrorated with dark brown to beyond middle, the inner area 

 irrorated with, white ; the veins streaked with pure white except 

 towards termen ; the interspaces between veins 9 and 11 and 

 above bases of veins 6 and 7 pinkish : the antemedial line re- 

 presented \>y a curved black line with brown on its inner side 

 between the cell and vein 1 ; claviform with its extremity defined 

 by black ; orbicular and reniform with brownish centres and white 

 and pink annuli defined by black, the former small, round ; the 

 postmedial line dentate, obsolete towards costa, angled inwards 

 in discal fold, excurved to vein 4, then incurved ; the subterminal 

 line represented by a series of dentate black marks interrupted 

 between veins 6, 7 ; a terminal black line. Hind wing yellowish 

 white suifused with brown, especially towards termen : cilia 

 yellowish white, with brown line near base ; the underside whitish, 

 the costal and terminal areas irrorated with brown, a dark 

 discoidal point, and some points on termen. 



Hal). Mongolia, Uliassutai Mts., 1 S , Changai Mts. ; Tibet, 

 Amdo ; E. Siberia. E.vp. 30 millim. 



563. Euxoa flavicollis. (Plate LXVII. fig. 8.) 



Agrotis flavicolUs, Smith, Pr. U.S. Nat. Mus. x. p. 456 (1887) ; id. Cat. N. 

 Am. Noct. p. 90. 



S . Head and thorax black-brown ; palpi and metathoracic crest 

 with some grey ; tegulse with the basal half yellow tinged with 

 rufous ; pectus and legs fuscous and grey, the tarsi with pale rings ; 

 abdomen grey, the anal tuft and ventral surface tinged with rufous. 

 Fore wing black-brown, the costal area to postmedial line yellow 

 tinged with rufous, the terminal area slightly irrorated with grey ; 

 the median nervure streaked with white ; the antemedial line 

 black, defined by brownish on inner side, obsolete on costal area, 

 angled inwards on median nervure and vein 1 and strongly 

 outwards above inner margin ; claviform large, defined by black, 

 with an ochreous streak from it to subterminal line ; orbicular and 

 reniform grey defined by black, and with some fuscous at centre, 

 the former small, oblique, elliptical, the cell before and between the 

 stigmata deep black ; the postmedial line minutely dentate, slightly 

 bent outwards below costa, angled inwards in discal fold and 

 oblique below vein 4, veins 3, 4, and defined by dentate reddish- 

 yellow marks from it to subterminal line, which is pale, minutely 

 waved, angled outwards at vein 7 and middle ; some pale points on 



