the Rhopalocera of the Ml. Everest 1921 Exjiedition. 465 



1 ^, 10 miles E. of Tatzang, 17,000 ft., 4/6/21 {B.). 

 Only very doubtfully separable from B. butlcri butleri 



from Ladak and Cashmere. 



9. Colias cocandica tibetana, ssp. nov. 



(PL XXXVI, fig. 9.) 



1915. Colias cocandica Evans, J. Bombay N. H. Soc, 

 xxiii, p. 534. 



2 ^, Nyenyam, 13,000 ft., 19/7/21 (If.). 



cJ. Upperside, fore-wing : pale grey with only a very plight 

 greenish suffusion. The light interncrvular spots in the broad 

 marginal black band produced as line rays which reach the margin. 

 Hind- wing darker grey and rather greener, internervular pale spots 

 not so well defined, a large pale area at cell end. Cilia white. 

 Underside : the hind-wing and the apical area oi fore-wing a beautiful 

 deep green, the submarginal spots of both wings rather ill-defined, 

 rust-coloured except in 16 and 2 of fore-wing where they are black. 

 Discocellular spot on fore-wing small, white centred ; on hind-wing 

 larger, pure white, nearly surrounded by a rusty area which is 

 produced towards margin in area 4. 



This race is a great deal more like typical cocandica than 

 is the Ladak representative (C. thrasibulus Frlih.), but 

 readily separable by its very grey appearance, which 

 contrasts strongly with the markedly green upperside of 

 cocandica. It is an approach to nebulosa Ob. from AV. 

 China, and probably is the same race of coca.ndica as that 

 referred to and figured by Evans (I.e.) from the Tsang-Po, 

 E. Tibet, at an altitude of 14,000 ft., collected by Capt. 

 Bailey. 



10. Colias fleldi edusina Felder. 



1907. Colias croceus race Jieldi Bing., Ic, ii, p. 243. (part). 



1909. Eurymus jieldi Swinhoe, in Moore, I.e., vii, p. 171. 



1910. Colias fieldi edusina Friihst., in Seitz, ix, p. 165. 

 1912. Colias fieldii edusina Evans, I.e., p. 979. 



2 c^, 2 ?, between Kharta and Chung Pu, 13,000 ft., 



28/7/21 ; 2 ?, 30/7/21 ; 1 (^, 1 ?, 31/7/21, Kharta, 12,000 

 ft. {B.). 



1 ?, 7/8/21; 1 c^, 14/8/21; 5 <^, 19/8/21; 5 ^, 20/8/21; 

 2 ^, 21/8/21, Kharta, 12,000 ft. ; 3 <5^, 17/7/21, Nyenvam, 

 12,500 ft.; 1 o"^, 28/7/21, Rongshar Valley, 14,000 ft. (IF.). 



