268 LEPinOPTEBA IN DIG A. 



Dqjsas sila, Hewitson, 111. Diurn. Lep. p. 64, pi. 26, fig. 3, $ (1865). 



Ze^ihyrus sijla, de Niocville, Butt, of India, iii. p. 305 (1890). Mackinnon and de Niceville, Journ. 



Bo. Nat. Hist. Soc. 1898, p. 384. Leslie and Evans, id. 1903, p. 674. 

 Zephyrus triloclia, Hannyngton, Journ. Bo. Nat. Hist. Soc. 1910, p. 367, 9 . 



Imago. — Male. Upperside metallic green^ with a somewhat bronzy gloss, of a 

 different hue to that of R. duma. Foreiving with costal black line, and a moderately 

 broad and even outer marginal black band. liindwing with costal space broadly 

 black, outer marginal band evenly black, a little broader than it is on the forewing ; 

 abdominal fold dark grey, tail black, tipped with white. Cilia white with black base. 

 Underside silvery-greyish-white, markings ochreous-brown. Forewing with a bar at 

 the end of the cell, edged with white, a moderately broad discal band, slightly 

 outwardly curved, with its lower end turned somewhat inwards, slightly decreasing in 

 width hiudwards, from the costa to vein 2, outw^ardly edged with white ; a sub- 

 marsinal band from the costa to the sub-median vein, where it is broadest, narrowing 

 upwards and sometimes becoming almost obsolete before reaching the costa. liindwing 

 with a short transverse line from near the costa one-fourth from the base ; a line closing 

 the cell ; a discal thin band, somewhat lunular, broadly edged with white on its outer side, 

 a black anal spot, capped with orange, a sub-terminal black spot in the first interspace, 

 ringed with orange, both wings with a grey band on the margin, a sub-terminal white 

 thread, most prominent on the hindwing, and a black anteciliary line. Antennas black, 

 ringed with white, club tipped with orange ; head and body above and below 

 concolorous with the wings, abdomen below white. 



Female. Forewing with the cell, a small space outside in the next low^er interspace, 

 and the whole of the interno-median area from the base to the outer marginal band pale 

 purplish-blue, a white spot at the end of the cell, another outside in the next lower 

 interspace, both varying somewhat in size in different examples, and sometimes with a 

 small orange or white spot below the outer spot, the costal space aboA'e the cell, the 

 apical space beyond the spots black and the outer margin with a fairly even and 

 moderately wide black band, the veins black, the place below the sub-median vein 

 suffused with black. Hindwing pale blackish, veins black, some bluish streaks on the 

 outer portions between the veins, outer marginal band narrowly black. Cilia and tail 

 as in the male. Underside also similar, bands usually narrower. 



Expanse of wings, $ ? 1^% to l-^V inches. 



Habitat.— N.W. Himalayas, Sikkim, Bhutan. 



Distribution. — The type is marked IST.W. Himalayas ; Doherty records it from 

 Dhankuri, N.W. Kumaon, 9,000 to 11,000 feet elevation, also from Chandans, X.E. 

 Kumaon ; Lang took it at Narkunda, near Simla, 9,000 feet ; de Niceville at Jalauri, 

 between Kulu and Simla ; Grahame-Young at Kulu, 7,000, 8,000, 8,800 and 9,000 feet ; 

 Mackinnon and de Niceville record it from Mussuri, Leslie and Evans from Chitral ; we 



