the RhopaJocera of the Mt. Everest 1921 Expedition. 473 



LYCAENIDAE. 



26. Polyommatus arene Fawcett. 



1909. Lycaena stoUczkana arena Seitz, i, p. 311. 



1910. Polyommatus ariana (part) Swinhoe, I.e., viii, p. 26. 



1 c?) between Kisliong and Sliekar Jong, 14,000 ft., 

 16/6/21 ; 2 c^, 1 ?, Sliekar Jong 14,000 ft., 17/G/21 {B.). 



11^, 7 ?, Tingri, 14,000 ft., 26/6/21 ; 1 (^, 1 ?, Nyenyam, 

 12,500 ft., 17/7/21 (Pf.). 



Fresh and very worn specimens were taken together on 

 17/6/21; fresh specimens again on 17/7/21, whilst all the 

 series from Tingri were taken in beautifully fresh condition. 

 This seems to contradict rather flatly the statement in 

 Lep. Ind., 8, p. 27, that arene is the dry-season form of 

 ariana, as all the specimens are referable to arene and 

 show very little variation indeed. None of the females 

 exhibit more than a trace of blue suffusion on the upperside. 

 The large white wedge-shaped mark arising from the orange 

 lunules of the underside of the hind-wing in areas 3 and 4, 

 and directed basad, as well as the pale ground-colour, 

 separate this species at once from the next. 



27. Polyommatus everesti, sp. nov. 

 (PI. XXXVI, fig. 1 S, 2, and 3 ?.) 



1 (^, 1 9, 27/7/21; 1 c?, 28/7/21, Rongshar, 13,000 ft.; 

 2 c^, 1 9, Rebu, 14,000 ft., 31/7/21; 5 (^, 1 ?, Kharta, 

 12,000 ft., 7/8/21 ; 2 c?, 1 ?, 19/8/21 ; 1 cj, 2 ?, 20/8/21 ; 

 1 ?, 21/8/21, Kharta, 12,500 ft. [W.). 



14 ^, 3 $, between Kharta and Chung Lung Pu, 13,000 

 ft., 28/7/21 ; 2 c^, 1 ?, 30/7/21 ; 3 (^, 2 ?, 31/7/21, Kharta, 

 12,000 ft. {B.). 



(J. Upperside, both wings : brilliant azure blue, the margins 

 narrowly black, inwardly crenulate, cilia long, silvery-white, darker 

 proximally. Ufiderside, fore-iving : ground-colour sooty grey, 

 slightly green tinged at the base, the ocelli black with very broad 

 and well-defined white rings, viz. one in cell, just before origin of 

 vein 3, and a discal series of six, the first and the last the smallest ; 

 a dark oval broadly white-ringed mark at cell end, the outer white 

 edging produced to form a white cone or Y-shaped mark; a sub- 

 marginal series of subcrescentic pale grey marks, followed by a 



