ori'iiTiiERA. 3G5 



round, the latter ver}' narrow with some whitisli beyond it ; }X)st- 

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

 then waved, incurved below vein k and exeurved at vein 1 ; svib- 

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

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

 grey. Underside of fore wing with whitish discoidal lunide. 



Hdb. E. Siberia, Amurland, Ussmi, Sidemi. £xj}. 40 miliim. 

 This species is unknown to me. 



Genus DIPHTHERA. 



Type. 



Diphtcrri, Oclis. Scbmett. iv. p. 63 (1S16) non descr ccenohita. 



Uil>hlhera, Treit. Sclmielt. Eur. v. (1) p. 47 (1825) canohifa. 



I'o/ithea, Iliibn. Verz. p. 202 (1827) ccenohita. 



Aiidcla, Wlk. Can. Nat. & Geol. vi. p. 37 (1861) acroni/ctoides. 



I'tatycerura, Tack. Troc. Ent. Soc. Phil. iii. p. 374 (1864)... furcilla. 



Proboscis aborted, mimite ; palpi porrect, extending to just beyond tlie frons 

 and clotlied with ratiier long hair ; IVons smooth ; eyes large, round ; antennre 

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

 and hair-like scales and witliout crests; tibia} moderately fringed with hair; 

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

 Fore wing with the apex rounded, tlie termen 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 foi-m a long narrow areole ; 11 from cell. 

 Hind wing witli 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 with the inner half of medial area almost, 



entirely black, abroad black shade before subterminal 



line cmwhita. 



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 tiie postmedial line very strongly 



incurved below vein 4 acroni/cioidcs. 



L"^. Fore wing witii the postmedial line sliglitly in- 

 curved below vein 4 grisea. 



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

 at median nervure. 

 a'-. Fore wing with the subterminal line prominent 

 and white. 

 a^. Fore wing with the antemedial line nearly 



straight furcilla. 



P. Fore wing with the antemedial line strongly 



sinuous ^j(W •/ 'a?? r?/a . 



6"-. Foi-e wing with the whitish subterminal line slight 

 and diffused. 

 c^. Fore wing with the medial line confluent with 



the reniform gigantea. 



b^. Fore wing with the medial line well separated 



from the reniform virgiiinria. 



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



