1897.] Indo- and Austro- Malayan Regions. 565 



same sex of G. zaneka in being broader, with a straight instead of exca- 

 vated costa, and the apex less produced. Hindwing also broader than in 

 G. zaneka. Otherwise similar to G. zanelca. The highly dentate hind- 

 wing in both sexes will distinguish. G. zaneka and G. zanekoides from 

 G. aspasia, Menetries. 



Mr. Moore's figure of G. zaneka (Proc. Zool. Soc. Lond., 1865, p. 493, 

 n. 35, pi. xxxi, fig. 18) is very bad ; though the sexes are so different, I 

 am unable to say which sex he has figured, and he does not furnish the 

 information. Mr. Leech (Butt. China, p. 444 (1894) says that G. zaneka 

 " Is probably only a local race " of G. aspasia, while it is with extreme 

 doubt he allows the latter species specific rank, but says that it is pro- 

 bably a variety only of G. rhamni, Linnaeus. As far as India goes, how- 

 ever, G. zaneka and G. rhamni are absolutely distinct species, the male 

 of the former can instantly be detected by its small size, difference in the 

 colour of the wings, and the highly scalloped hindwing; while the female 

 is markedly smaller, and also has the hindwing scalloped. 



I am indebted to Capt. E. Y. Watson for a pair of this species, 

 which were captured by Mr. L. A. Thruston at 7,000 feet elevation in the 

 Southern Chin Hills during the rains. Capt. Watson has a second male 

 specimen in his collection. Geographically G. zaneka and G. zanekoides 

 are widely separated, and it is highly improbable that any species link- 

 ing them together will be found in the mountains which lie between 

 the Western Himalayas and Upper Burma. 



Subfamily Papilioninj). 

 20. Papilio (Byasa) polla, de Niceville, Plate IV, Fig. 28, <?. 



P. (Byasa) polla, de Niceville, Journ. Bomb. Nafc. Hist. Soc, vol. x, p. 633, n. 2 

 (1897) ; id., Watson, 1. c, p. 671, n. 235. 



Habitat : North Shan States ; North Chin Hills, 5,000 feet. 



Expanse : cf, 50 inches. 



Description : Male. Upperside, both wings shining black. Fore- 

 wing with the usual three deep black longitudinal streaks in the dis- 

 coidal cell, and similar ones between the veins on the disc. Hindwing 

 with a large discal pinkish-white patch, the patch occupying the outer 

 end of the cell, anteriorly bounded by the second subcostal, posteriorly 

 by the first median nervule, the inner half of the portion in the first 

 median interspace being heavily sprinkled with black scales, the 

 outer edge of the patch is scalloped ; four large submarginal car- 

 mine lunules all irrorated with black scales, the anterior one in the 

 subcostal interspace whitish ; tail broadly tipped with carmine ; the 

 posterior end of the abdominal fold and the two tooth-like projections 

 of the wing-membrane between it and the tail, as well as the first 



