DIPHTHEEA. 3G5 



round, the latter very nai-row with some whitish beyond it ; post- 

 medial line dark defined on outer side by whitish, oblique to vein 6, 

 then waved, incurved below vein 4 and excurved at vein 1 ; siib- 

 terminal line very indistinct, whitish defined on inner side by brown, 

 excurved below vein 7 and at middle. Hind wing rather browner 

 grey. Underside of fore wing with whitish discoidal lunule. 



Hah. E. Siberia, Ainurland, Ussuri, Sidemi. ExjJ. 40 millim. 

 This species is unknown to me. 



Genus DIPHTHEEA. 



Type. 



Diphtera, Oclis. Scbmetfc. iv. p. 63 (1816) non descr coeiiohiia. 



Biphihera, Treit. Schniett. Eiir. v. (1) p. 47 (1825) caenobita. 



Fanthea, Hiibn. Vera. p. i202 (1827) coeuohiia. 



Audela, Wlk. Can. Nat. & Geol. vi. p. 37 (1861) acronyctoides. 



Flatycerura, Pack. Proc. Ent. Soc. Phil. iii. p. 374 (1864)... furcilla. 



Proboscis aborted, minute; palpi porrect, extending to just beyond tbe frons 

 and clothed with rather long liair ; Irons smooth ; eyes large, round ; antennre 

 of male bipectinate with moderate branches to apex; thorax clothed witli hair 

 and hair-like scales and without crests; tibiaj moderately fringed with hair; 

 abdomen with dorsal series of small bairy crests and lateral tnfts of hair. 

 Fore wing with the apex rounded, the terinen evenly curved and not crenulate ; 

 vein 3 from before angle of cell ; 5 from just above angle ; 6 from upper angle ; 

 9 from 10 anastomosing with 8 to f'oi-ni a long narrow areole ; 11 from cell. 

 Hind wing with the cell half the length of wing; vein 3 from angle; 5 fully 

 developed from just above angle; G, 7 from upper angle; 8 anastomosing with 

 the cell near base only, 



A. Fore wing with the subterminal line dentate. 



a. Fore wing witli the inner half of medial area almost, 



entirely black, a broad black shade before subterminal 



line ccenobita. 



b. Fore wing with the inner half of medial area not black, 



the black or brown shade before subterminal line 

 narrow. 

 a} . Fore wing with the medial line angled outwards at 

 median nervure. 

 a~. Fore wing with tlie postmedial line very strongly 



incurved below vein 4 acronyctoides. 



b"^. Fore wing with the postmedial line sliglitly in- 

 curved below vein 4 grlsea. 



b^. Fore wing with the medial line not angled outwards 

 at median nervure. 

 a^. Fore wing with the subterminal line prominent 

 and white. 

 a^. Fore wing witli the antemedial line nearly 



straight , furcilla. 



b^. Fore wing with the antemedial line strongly 



sinuous 2^0Ttlandia. 



b'-. Fore wing with the whitish subterminal line slight 

 and diffused. 

 a'. Fore wing with the medial line confluent with 



the reniform gigantea. 



b^. Fore wing with the medial line well separated 



from the reniform virginaria. 



B. Fore wing with the subterminal line not dentate palata. 



