2 o J. N. ELIOT 



7 (5) Fore wing with streak beyond cell not extending into the base of space 3 (except 



in N. miah sometimes) ......... 8 



- Fore wing with streak beyond cell extending narrowly into the base of space 3 on 



upper or under surface or on both. N. zaida group .... 47 



8 (7) Under surface of hind wing with a subbasal streak, basal streak does not reach 



vein 8 ............ 9 



- No subbasal streak ; basal streak reaches vein 8 near its origin . . . 41 



9 (8) Under surface of hind wing with discal fascia placed centrally between the 



discal and postdiscal bands, usually whitish and prominent (except in some 



dry season forms, in which it is obsolescent) . . . . . . 10 



- Discal fascia obsolete (N. noyala) or much closer to the discal than to the post- 



discal band and outwardly edged, or partly obscured, by a dark band or series 



of blotchy spots ........... 26 



10 (9) Fore wing cilia with a white patch in space 8 . . . . . . 11 



- Fore wing cilia fuscous in space 8 ........ 25 



ii (10) Male clasp ends in a comparatively large sickle-shaped hook (Text-figs. 16, 



17, 29-33). N. hylas group ......... 12 



- Male clasp ends in a more or less rectangular projection, bearing at its apex a 



comparatively small scythe-shaped hook (Text-figs. 34-41). N. nata group 21 



12 (11) Under surface of hind wing with discal band and/or discal fascia continued into 



space 7. Fore wing postdiscal spots in spaces 2, 3 and 5 not in line (except 



in N. ida) ............ 13 



- On hind wing both discal band and discal fascia end on vein 7. Fore wing 



postdiscal spots in 2, 3 and 5 in line and directed to costa duryodana (p. 54) 



13 (12) Hind wing discal band expands from dorsum to costa ..... 14 



- Hind wing discal band more or less same width throughout . . . . 15 



14 (13) Fore wing postdiscal spot in space 3 confined to lower part of space and joined 



to spot in 2, which is well separated from the conjoined spots in spaces ia 

 and ib. White markings with a bluish tinge . . . nisaea (p. 55) 



— Fore wing postdiscal spots in spaces 3, 2 and ia/ib separate and more or less 



evenly spaced. White markings without a bluish tinge . clinioides (p. 55) 



15 (13) Fore wing cilia with white patches in spaces 6 and 7. Male clasp without a 



dorsal projection at the base of the sickle, which is comparatively stout . 16 



- Fore wing cilia usually fuscous in spaces 6 and 7, but occasionally with a few 



white hair scales. Male clasp with a small dorsal projection directed inwards 



at the base of the sickle (as also in N. clinioides) . . . clinia (p. 56) 



16 (15) Fore wing with prominent cell streak and streak beyond cell . ... 17 



- Fore wing with very narrow cell streak and small streak beyond cell, both almost 



obliterated on the upper surface by fuscous scales, but a little better defined 



on the under surface ........ gracilis (p. 65) 



17 (16) Upper surface of fore wing usually with indications of a dark line across the cell 



close to the discocellular bar. Hind wing cilia chequered with the white 

 patches at least as wide as the dark patches (except in Mindanao, Bazilan 

 and Sulu Archipelago) ; spots of the postdiscal band, especially those in 

 spaces 4 and 5, with their inner edges more or less rounded . . . 18 



- Fore wing cell streak without indications of a transverse line. Hind wing 



cilia narrowly chequered, the white patches smaller than the dark ; post- 

 discal band inwardly almost even-edged ..... yerburii (p. 68) 



18 (17) Under surface some shade of yellow to reddish ochreous, with the hind wing 



discal band and usually most of the other white markings outlined by black 



lines ............. 19 



- Under surface always more reddish where sympatric forms occur, with the 



white markings more weakly, or not, outlined in black .... 20 



