148 GEOMETRID#. 
3089. Sirinopteryx undulifera, Warr. P. Z. 8. 1893, p. 385. 
Differs from rufivinctata in being ochreous; the lines more 
oblique ; the postmedial line of fore wing waved and arising from 
_ apex; a speck at end of cell of each wing. 
Hab. Sikhim. Hep. 50 millim. 
Genus THINOPTERYX. 
Thinopteryx, Butl. Journ. Linn. Soc. xvii, p. 202 (1883). 
Type, 7. crocoptera, Koll. 
Range. Japan; China; throughout India and Ceylon; Anda- 
mans; Java. 
Differs from Urapteryx in the antenne of the male being fasci- 
culated ; the palpi slightly longer. Fore wing with the apex more 
produced; vein 3 from before angle of cell; 7, 8, 9 from before 
upper angle; 10 present and given off from 11 after its anasto- 
mosis with 12. Hind wing with the outer margin angled below 
apex, and tailed at vein 4; vein 3 from before angle of cell. 
3090. Thinopteryx crocoptera, Koll. Hiigel’s Kaschmir, iv, p. 483; 
C. §& S. no. 3114. 3~ 
Thinopteryx nebulosa, Butl. Journ. Linn. Soc. xvii, p. 203, id. Il. 
Het. vi, pl. 118, fig. 8; C. § S. no, 3115. / 
Thinopteryx striolata, Buti. Journ. Linn. Soc. xvii, p. 202. 
Urapteryx preetoraria, Feld. Reis. Nov. pl. 122, fig. 138; C§ S. 
no. 3116. / 
Thinopteryx citrina, Warr. Nov. Zool. p. 401. 
Orange-yellow; head and collar white, irrorated with fuscous ; 
wings with numerous orange strige more or less combined into 
patches. Fore wing with the costa white, irrorated with fuscous ; 
Fig. 79.—Thinopteryx crocoptera, d. }. 
ante- and postmedial oblique fuscous lines, sometimes slightly 
curved ; a fuscous line on discocellulars ; a submarginal more or 
less lunulate line, often reduced to a series of specks towards costa. 
