84 LEPIDOPTERA INDICA. 



saj^s it is " found in Sikkim with dissimilis at the same elevations and seasons. I 

 have no doubt that these two species are really one species, which is dimorphic iu 

 both sexes, but as this theory has never been proved, I have kept them distinct. 

 Mr. Dudgeon has noticed the two species flying together, but has not succeeded in 

 taking the opposite sexes in coitu " (Sikkim Gaz. 1894, ] 73). We possess males 

 from Gurhwal and Sikkim, and one from Bhotan, taken by Mr. G, C. Dudgeon. 



Our Plate 501, figs. 1, la, represent a male, and figs, lb, c, a female from the 

 "Western Himalayas. 



CHILASA CASYAPA (Plate 502, fig. 1, Jami andj>!/jw, la, ^J, lb, ? ). 



Papilio Casyapa, Moore, Proc. Zool. Soc. LonJ. 1S79, p. 143. 



Papilio {Chilasa) Casyapa, de Niccville, Journ. As. Sjc. Bengal, 1885, p. 52. 



Papilio Clijtia, aber. Casyapa, Rothschild, Nov. Zool. ii. p. 367 (1895). 



Papilio Clt/tia, Aitken, Jouin. Bombay IST. H. Soc. 1887, p. 37. de Niceville, Journ. As. Soc. Bengal, 



1900, p. 259. 

 Papilio (Chilasa) Chjtia, Hampson, Journ. As. Soc. Beng. 1888, p. 363. Ferguson, Journ. Bombay 



N. H. Soc. 1891, p. 416. 

 Papilio Panope, Moore, Proc. Zool. Soc. 1865, p. 756. Watson, Journ. As. Soc. Beng. 1890, p. 268; 



id. Journ. Bombay N. H. S)c. 1890, p. 9. Betham, id. 1891, p. 325. 

 Chilasa Chjtia, Swinhoe, Proc. Zool. Soc. 1885, p. 145. 

 Chilasa Panope, Swinhoe, Trans. Enfc. Soc. Lond. 1893, p. 314. 

 Papilio dissimilis and Panope, Davidson and Aitken, Journ. Bombay N. H. Soc. 1890, p. 3G8 ; id. 



1896, p. 583. 



Imago. — Male and female. Upperside. Foreivimj differs from the W. Himalayan 

 Chjtia in having a third or outer-discal series of white-speckled slender dentate 

 spots more or less developed in both sexes, the submarginal spots are also generally 

 smaller and the upper one either obsolescent or absent. Hindwivg with the discal 

 sagittate streaks somewhat shorter, generally narrower, and well separated from the 

 submarginal spots, the marginal ochreous lunules being very narrow or obsolete. 

 Underside. Foreiciiig with three series of markings, as on the upperside. Hindwing 

 similar to Glijtia. 



Expanse, 4 to 4^ inches. 



Larva. — "Not unlike the Ornithoptera group in form, having similar rows of 

 fleshy processes. It is of a dark brown colour, with a bright red spot at the base of 

 each process, a dorsal row of large, irregular, yellow patches, and a partial lateral 

 row endino- in a diagonal band which connects the two." 



Pupa. — " Resembles a dead twig about an inch long and less than a quarter of 

 an inch in diameter, broken off irregularly at one end. The last segment is so 

 modified that the pupa is not attached by one point, but appears as if it had grown 



