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A LIST OF BUTTEEFLIES CAUGHT BY CAPT. P. M. 

 BAILEY IN S. E. TIBET DURING 1913, 



BY 



Oapt. W. H. Evans, R. E. 



(With a Plate and a Ma^.') 



In 1913 Capts. Bailey and Morshead succeeded in traversing a 

 previously iinexplored tract of country in S. E. Tibet. A full 

 account of their journey will be found in the proceedings of the 

 Royal Geographical Society ; the following brief narrative and the 

 map will, however, help in explaining the localities mentioned in 

 the list of butterflies. 



Leaving the Mishmi country and the valley of the Dibang river 

 in the middle of May, they travelled through the coimtry east of 

 the Tsang Po ( Dihang) arriving at Kapu on that river on 

 June 5th. Thence they travelled down the river as far as Runchen- 

 pung and then up again to Lagong (June 19th), where the Tsang 

 Po pierces the main range, which separates India from Tibet. Above 

 Lagong the route along the river is impassable except during the 

 winter month and accordingly the travellers struck north over the 

 Su La (June 23rd) into the valley of the Po Ohu. They spent 

 several weeks exploring the Po Chu and its tributaries, the Ygrong 

 Ohu and the Rong Ohu, eventtially crossing the Nyama La (July 

 1 3th) and reaching the Tsang Po again at Pe (July 1 3th). From Pe 

 they went down the Tsang Po as far as Pemako Ohung (July 21st) 

 and then back again to Pe (Aug. 4th). The course of the Tsang Po 

 was followed up as far as Shu (Aug. 18th) where a slight detour to 

 the" south over the Kongbo Nga La (Aug. 18) was found necessary ; 

 a second detour over the Putrang La (Aug. 28th) was made later. 

 At Tsetang (Aug. 29th) the Tsang Po was left for good and 

 the explorers struck soiith up the Yarlung Ohu and over the 

 Yartotra La (Sept. 2nd) and then over the Pu La into the 

 valley of the Subansiri (Sept. 4th). They went down the Ohar 

 Ohu for four days and then up the Karpo Ohxi over the Kumba La 

 into the basin of the Tsang Po : thence over the Kongmo La 

 (Sept. 12th) into the Tsari Ohu valley, another branch of the 

 Subansiri. The Tsari Ohu was followed down as far as Migyitun 

 (Sept. 18th), whence they re-entered the Ohar Ohu Valley via the 

 Tanga La (Sept. 21st) : this valley was left at Oharme (Sept. 

 22nd) and the Nye Ohu [Sept. 26th), entered via the Le La. 

 They went down the Nye and Ohayul valleys as far as Drotang 

 and then up the Ohayul Ohu, called the Loro in its upper reaches, 

 into the Loro Napko Ohu. On October 2nd they left the basin of 

 the Subansiri by the Pen La and proceeded via the Tulung La 



