80 THOLERA; THARGELIA; ODONTELIA. By W. Wakeen. 



11. Genus: Tholera Hbn. 



The imago differs from Hadena mainly by the absence of the tongue. The larva feeds at roots of 

 grasses; the thoracic and anal plates being hard and horny; the tubercles raised and black. 



Type Th. cespitis F. 



Section I: Antennae of cf bipectinate to apex. 



popularis. ThXpopularis F. (= lolii Esp., graminis Hbn.) (19 h). Forewing olive fuscous tinged with purple; 



all the veins white; inner and outer lines double, black; submarginal whitish, preceded by black wedge- 

 shaped spots ; claviform stigma of the ground colour outlined with whitish and black and with a pale linear 

 centre; upper stigmata white-ringed with olive centres, reniform with a curved pale line at centre; hind- 

 hilaris. wing in cf dull white with fuscous termen, in ? wholly fuscous with base alone paler; — ab. hilaris Stgr. 

 (19 h) is smaller and paler, the hindwing of o* whitish. — Generally distributed in Europe,~and occurring 

 in Armenia, Asia Minor, and Siberia ; the aberration only in Asia Minor, and S. E. Russia. — Larva shining 

 bronzy brownish, with the tubercles large and black; head and thoracic plate dark brown; at the roots of 

 grasses, living through the winter and feeding up in summer. 



Section II: Antennal pectinations of cf short. 



cespitis. Th. cespitis F. (= hordei Schrank, autumnalis Curt, confinis Stpih., chloris Mill) (19 h). Forewing 



dark earth brown; lines indistinct; inner and outer black with paler edges; submarginal pale, with black 

 wedge-shaped spots before it; claviform stigma obscure, black-edged; orbicular roundish, brown with pale 

 ring; reniform large with paler outline, especially externally; hindwing whitish, the veins dark; termen 

 fermginea. diffusely brownish; in cf white, with termen narrowly grey; — ab. ferruginea Hofm. (= decolor Sohn) is 

 much paler with a reddish yellow tint. — Larva shining dark brown; thoracic and anal plates black; head 

 brown; dorsal and subdorsal lines narrow, pale yellow; lateral stripe broader; spiracles black; at roots of 

 grasses. Occurs throughout Europe and in the Altai Mts., W. Siberia; the aberration ferruginea in Carinthia 

 and the Tyrol. 



12. Genus: Thargelia Fung. 



Tongue aborted; frons with a rounded prominence with corneous plate below it; antennae of cf 

 serrulate, with short sessile fascicles of cilia; two small claws at end of foretibia, one larger than the other. 



Type T. distincta Christ. 



distincta. T. distincta Christ. (20a). Forewing grey dusted and shaded with darker grey; veins blackish; 



lines obsolete; stigmata concolorous, with the edges black; claviform elongate, with a black streak into it 

 from base; orbicular elongate, flattened; reniform large, angled outwards on veins 3 and 4 and inwards on 

 median vein; submarginal line paler, produced as pale teeth along the black veins; marginal area between 

 these darker; hindwing dull whitish; cellspot, veins, and a submarginal cloud grey. W. and E. Turkestan. 



fissilis. T. fissilis Christ. (20a, b). Smaller than distincta, dingier grey; the stigmata smaller; hindwing 



white. W. and E. Turkestan. 



13. Genus: Odontelia Hamps. 



Differs from Thargelia Fung, in the foretibia being simple, without the small spur at end. 



Type 0. margiana Piing. 



Section I: Antennae of cf bipectinate to apex. 



margiana. O. margiana Piing. cf: forewing greyish white, dusted with blackish scales, and in places ochreous- 



tinged; lines hardly traceable, except just at costa; claviform stigma elongate, outlined with black; orbicular 

 and reniform whitish outlined with black, the former narrow and elongate, the latter with fuscous in upper 

 half, angled inwards on median nervure and its lower outer end produced; veins before termen dark; fringe 

 mottled; hindwing whitish, the veins and terminal half streaked with fuscous. ? more ochreous, with bla^k 

 streaks before and beyond claviform; the orbicular confluent or nearly so with reniform, which is bidentate 

 at lower extremity. Merv, and the Tedschen oasis, W. Turkestan. 



Section II: Antennae of cf with short sessile fascicles of cilia, as in Thargelia. 



megastigma. O. megastigma spec. nor. (20 b). Larger and paler than distincta Christ, luteous-tinged ; the stigmata 



paler, with thick black outlines; orbicular club-shaped running out from base through cell and coalescing 

 at end with the very large reniform, the angles of which are amplified ; hindwing luteous white, with traces 

 of a postmedian line. Dortkujn, West of Merv, May 1903, 1 </, 4 ¥?. Agrees almost entirely with the 

 description of 0. margiana Piing., the cf of which has the antennae strongly pectinated. 



