NAG A HILLS BUTTERFLIES. 129 



always clearly visible in its allies. The blue line near tornus of upper 

 hindwing also at once distinguishes it, 



Zephyrus zoa, De Niceviile. 



Many males were taken on Kabru, Manipur, at 8,400 feet, in July and 

 August, most of the specimens in the latter month were worn and useless. 

 Many females were taken on Kabru which undoubtedly belong to both this 

 species and to Z. dumoides, they vary a good deal inter se, but I can find no 

 certain character by which to assign them to their respective males. I am 

 however inclined to think that specimens which have the postmedian narrow 

 white bands on both wings very narrow and straight and the terminal area 

 of the hindwing below very sparsely irrorated with pale scales should be 

 assigned to this species. This species was originally described by De 

 Niceviile from a single male obtained by Mr. A. V. Knyvett on Tiger's Hill 

 above Darjeeling at 8,000 feet elevation on 26th June 1888 and has not 

 again been met with by any collector; De Niceviile subsequently was of 

 the opinion that it was a sport of Z. duma. It is however undoubtedly a 

 good species and the males are very constant in the extent of the powdery 

 dark green scales, some males however have the green scales tinted with 

 violet in certain lights. It appears to be an extremely local species and I 

 have only obtained it on top of Kabru mountain. The Manipur form differs 

 from De Niceville's description and figure in not having the black border of 

 forewing of even width as far as interspace 6 ; at vein 4 the black border 

 widens out, the green scales being confined to the base of interspace 4 

 and 5 and quite wanting in interspace 6, giving the apical area a very black 

 appearance; it is however not advisable to separate it as a race until the 

 Sikkim form is rediscovered and found to be constant in the even width of 

 the black border of forewing. 



It agrees much better with De Niceville's description and figure of Z. zoa 

 than does the next species. 



Zephyeus doni, n. sp. 



Male. Upper siide: dull powdery green turning to purple in certain lights 

 and almost invisible in others. Forewing : with a broad even black terminal 

 border. Hindwing : broadly black along the costa, termen and dorsum, the 

 green scales being confined to the disc as in Z. zoa. Underside : both 

 wings pale brown. Forewing : discocellulars faintly marked on either side 

 with white ; a post discal narrow white band, inwardly bordered with dark 

 brown, ending at vein 2 ; a subterminal white line inwardly bordered with 

 dark brown which widens outwards the dorsum. Hindwing : discocellulars 

 unmarked, a post discal narrow white band bordered inwardly with dark 

 brown as on forewing ending in a " W " at the tornal angle ; terminal area 

 darker brown with two subterminal white lines and a terminal line of the 

 same colour on it. Tornal area orange inwardly bordered with black, with a 

 large black spot in interspace 2 and some black scales in interspace 1. 



Expanse : S 1'4". 



A single male taken on Suroifui, Manipur, 8,000 — 9,000 feet, in July. 



Its nearest ally appears to be Z. zoa from Manipur which however has not 

 yet been taken on Suroifui. It differs from that species in its miich 

 smaller size ; on the upperside the green scales are not so powdery, the 

 black border is wider in proportion to the breadth of the wings and is of 

 even width from the dorsum to vein 6 in Z. zoa from Manipur ; the black 

 border widens out markedly at vein 4 filling the apex. On the underside 

 it is a much paler brown. Forewing : the discocellulars not so well marked. 

 Hindwing : the sub-basal streak in interspace 7 wanting ; the discocellulars 

 unmarked ; and the two subterminal white lines better defined. 

 17 



