516 GEOMETRID &. 
mark and indistinct slightly curved postmedial green line, retracted 
to costa of fore wing and to inner margin of hind wing. Under- 
side with the hind wing and inner area of fore wing whitish. 
flab. Nilgiris. Hap. 32 millim. 
4137. Thalera viata, Moore, Lep. Ceyl. iii, p. 431, pl. 195, fig. 6; 
C. §& S. no. 3495. 
2. Yellow-green. Fore wing with nearly straight green-edged 
white ante- and postmedial lines. Hind wing with dark line on 
discocellulars and slightly curved green-edged white postmedial — 
line. Underside white. 
flab. Ceylon. Hay. 24 millim. 
4138. Thalera pallescens, 2Jmpsn. Ill. Het. viii, p. 108, pl. 151, fig. 3. 
White ; the frons, thorax, and abdomen suffused with grey-green ; 
wings semihyaline, with broad medial grey-green band bounded 
by the ante- and postmedial lines which are white, the former 
obliquely sinuous on fore wing, oblique and straight on hind 
wing, the latter sinuous on fore wing and curved on hind wing ; 
slight white marks on discocellulars; slight grey-green diffused 
patches beyond the postmedial line of each wing. 
Hab. Nilgiri plateau. Hap. 32 millim. 
C. Antenne bipectinate in both sexes. 
4139. Thalera liliana, Swink. Trans. Ent. Soc. 1892, p. 7, pl. 1, 
fig. 2. 
2. Blue-green; frons ochreous; abdomen ochreous, except the 
basal segment; some crimson on dorsum. Fore wing with the 
costa ochreous, irrorated with fuscous; a waved antemedial white 
line; both wings with lunulate postmedial white line ; cilia white, 
tipped with crimson, and with ochreous and fuscous specks at the 
veins. Underside white. 
Hab. Khasis. Hap. 54 millim. 
Sect. II. (Thalera). Hind wing of male with the outer margin 
excised between veins 6 and 4; veins 3, 4 stalked; hind 
tibie of male dilated with a fold and tuft and two pairs on 
spurs in the Indian forms; not dilated and with one pair of 
spurs in the European. 
A. Hind wing of female excised. 
4140. Thalera chrysolineata, Wik. Cat. xxvi, p. 1621; Moore, Lep. 
Ceyl. iii, pl. 196, fig. 4; C. & S. no. 3496. 
Olive-green; frons rufous; vertex of head white ; abdomen with 
dorsal white spots; wings with numerous irregular white spots 
often conjoined into bands. Fore wing with spots at base and 
