BUTTERFLIES. 175 



500. Papilio (Zetides) bathycles, Zinken-Sommex*. 



Rather less common than P. eurypijlus^ Linnajus, but found at 

 the same time and in the same places. It is equally variable and 

 inconstant, these variations having received the names P. cMron, 

 Wallace, P. hathtjcldides, Hourath, and P. chironides, Ilonrath. It 

 occurs also in Central China. 



501. Papilio (Zetides) agamemnon, Linnaeus. 

 Common at low elevations throughout the year. 



502. Papilio (Dabasa) gyas, Westwood. 



Very rare in Sikhim, and occurs from 6,000 to 7,000 feet on 

 Birch Hill, Senchal, and Rikisum, in July and August, but is more 

 common on the Labah ridge in Baling at 7,000 feet. It is found in 

 Western China under the name of P. hercides, Blanchard, == P. sciron, 

 Leech, which seems to be a good local race. 



503. Papilio (Meandrusa) evan, Doubleday. 



Mr. G. C. Dudgeon possesses a male of this species taken at 

 Sivoke on loth March, 1890. To the eastwards in Bhutan and the 

 Khasi Hills, it becomes somewhat common. 



504. Papilio machaon, Linnajus. 



The particular form of this species which occurs only at high 

 elevations in the interior has been named P. sikkimensis by Mr. Moore. 

 It flies in July and August. 



505. Parnassius haedwickii, Gray. 



Common on the higher ranges in the interior. It is exceed- 

 ingly variable; the blackest specimens of the species I have ever 

 seen have come from Sikhim, others again are very light coloured. 



506. Parnassius epaphus, Oboi-thiu-, var. sikkimensis, Elwes. 

 Appears to be excessively rare, Mr. H. J. Elwes took it once 



near the Donkia Pass, 18,000 feet, in native Sikhim in September, 

 1870, and in 1881 obtained fourteen specimens through a Bhutea 

 plant collector from the Sikhim-Tibet frontier or in the Chumbi 

 Valley. It does nof appear to have been captured since. 



507. Parnassius acco. Gray. 



Mr. H. J. Elwes records a single specimen received at the same 

 time as the fourteen examijles of P. sikkimensis, Elwes, above-men- 

 tioned. 



508. Armandia lidderdalii, Atkinson. 



Both sexes occur not uncommonly during the summer on the top 

 of a hill behind Buxa in Bhutan. Mr. W. Doherty has obtained the 

 species in Assam. 



