NAG A MILLS BUTTERFLIES. 125 



6. 7. Upperside : Males : green, sometimes violet in certain lights, 



Hindwing : black border broad and not sprinkled with blue 

 scales. 

 Undemide : costal end of discal band on forewing conspicuously 

 broader than tornal end. 17. Zephyrus syla, Kollar. 



7. 6. Upperside : Males : green, never tinted with violet. Hindwing : 



black border narrow and sprinkled with blue scales, 

 Underside : costal end of discal band on forewing not conspi- 

 cuously broader than tornal end. 18. Zephyrus assamica, 

 n. sp. 



8. 1. Underside: Hindwing : discal band distinctly irregular, either 



continuous or broken up into detached or semi-detached 

 streaks. 



9. 12. Hindwing with tails. 



10. 11. Hindwing : M?Z(ierszcZe .• discal band continuous ; portions in inter- 



spaces 4 and 5 projecting outwardly beyond portions in 3 

 and 6. 19. Zephyrus kirbaribnsis, n. sp. 



11. 10. Underside: Hindwing: discal band not continuous but com- 



posed of semi-detached streaks. Portions in interspaces 4 

 and 5 not as in 10 but more inwardly placed than portions in 

 3 and 6. 20. Zephyrus paona, n. sp. 



12. 9. Hindwing without tails. Underside : discal band irregular and 



composed of detached streaks. Portions in interspaces 4 and 

 5 placed more inwardly than portion in 3 but more outwardly 

 than portion in 6. 21. Zephyrus khasia, de N. 



Gr. Upperside : grey blue with two white costal spots on forewing. Sexes 

 alike, above and below. 22. Zephyrus ziha, Hewitson. 



Zephyrus pavo, de N. (PL IV, fig. 29, $ ). 



A cjandj taken above Kirbari, Naga Hills, at about 7,000 feet in June. 

 Two males at the same place in July. A worn female above Kohima in 

 September and another damaged female above Jakama during the same 

 month. 



The female differs from the male in having on the underside of the fore- 

 wing an orange discal patch beyond the cell in interspaces 2 and 3 ; it is 

 otherwise similar. 



Mr. de Niceville's description of the female applies really to the male as 

 he makes no mention of the orange discal patch on the underside of the 

 forewing. 



Doherty obtained a male of this rare species at Margherita in Upper 

 Assam at only 400 feet according to Mr. de Niceville ; if this is really so it 

 is very low for a Zephyrus to be foimd. It is highly probable that there has 

 been a mistake and that 400 feet should really read 4,000 feet ; even that is 

 very low for a Zephyrus in Assam. I have never taken one below 6,000 feet. 



Zephyrus ataxus zulla, n. sub-sp. 



A female taken on Paona Hill above Kirbari, Naga Hills, at 7,000 feet at 

 the end of June and a male at the same place in the middle of July. On 

 the upperside the male differs from Murree specimens of Z. ataxus in having 

 the apical and terminal black border on both wings conspicuously nar- 

 rower. The female on the upperside does not differ from the typical form. 

 Underside : both sexes have the dark markings more distinct. 



Zephyrus suroia, n. sp. (PI, IV, figs. 30, 31.(5,$). 

 Male. Upperside : both wings rather dark shining green. Forewing : 

 a black terminal border continued narrowly to middle of costa, broad at 

 apex narrowing towards the tornus. Hindwing : costa broadly dark brown; 



