498 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. V1I1. 
of males showing every stage from one extreme, with all the veins 
on the underside of the hindwing broadly black, to the other extreme, 
in which the whole hindwing is of a uniform, slightly ochreous tint, 
the only marking being a few greyish scales across the end of the cell. 
Five forms from my collection are figured on Plate II. Figure 1 from 
a specimen taken at Pokoko, Upper Burma, in October ; figure 2 from 
a specimen taken in the Upper Chindwin District, Upper Burma, in 
May; figure 3 from a specimen taken at the same time and place ; 
figure 4 from a specimen taken in the Yaw District, Upper Burma, in 
January ; and figure 5 from a specimen taken at Toungoo, Lower 
Burma, in January. 
It is curious that Colonel Swinhoe has failed to recognise the fact 
of the above forms being seasonal, for though he has never met with 
A, zelmira in life, yet A. libythea is a common species in Western 
India, where he has spent the best part of his life, and though the males 
of the latter species do not vary to the same extent as do the males 
of A. zelmira, yet the females show a complete transition from one 
extreme to the other. Col. Swinhoe also states he has a long series of 
all three species (i.e., A. libythea, A. ares and A. retexta), but makes no 
mention of intermediates, though my experience is, that if a large 
series be collected, month by month, there are very numerous 
specimens which cannot definitely be assigned to any one particular 
named form. 
In nearly all its forms, the male of A. zelmira can be distinguished 
from that of A, libythea by the black venation of the underside of the 
hindwing as well as by the much larger extent and white spotting of 
the apical patch on the forewing ; the dry-season forms, however, are 
not so easily separated, as not only is the black venation of the under- 
side entirely absent in A. zelmira, but the white spotting of the apical 
patch on the forewing is also obsolescent ; however, the greater extent 
of the apical patch in A. zelmira appears to be a good and constant 
character, as in dry-season A. lebythea this apical patch is almost 
entirely wanting. 
The females are similarly easily enough separated in the rainy-season 
forms, the female of A. zelmira being much more richly marked with 
yellow and green on the underside of both wings, though these tints are 
not entirely absent from the extreme rainy-season female of A, libythea 
