354 Mr. H. J. Elwes’ catalogue of the 
species, which appear to run into each other. Mr. de 
Nicéville, who keeps them separate in his book, suggests 
that ranga is the winter or dry-season form of mahesa, 
and says that ranga occurs only in the spring and late 
autumn; but Mr. Moller finds both of them at various 
seasons from March to December in the warm valleys 
up to about 3000 ft. Mahesais the commoner form. 
167. Athyma orientalis, Elwes, n.s. (P1.IX., fig. 4, 3.) 
Athyma opalina, Koll., in part; de Nicé., Butt. Ind., 
dts Did. [ks 
The species found in Sikkim, which has been included 
by de Nicéville with A. opalina, Koll., from the North- 
west Himalaya, is, in my opinion, distinct. In Moore’s 
collection it is placed with the female of A. selenophora 
as A. bahula, but the description applies to the female 
of that insect, and therefore the name bahula cannot be 
used for what I now call orientalis. I have eight males 
from Sikkim, one from Nepal, and two from the Khasia, 
which all agree in being of a much darker colour than 
any of my specimens of opalina, which are from Murree, 
Simla, Kangra, Mandi, and Chamba; the bands of the 
hind wing are also narrower, and of a less pure white, 
so that I should have no difficulty in distinguishing the 
eastern form if the labels were removed. I have not, 
however, as yet been able to procure the female of the 
eastern form, which will probably resemble the male, as 
does the female of opalina. There is no doubt that 
de Nicéville is correct in identifying bahula, Moore, as 
the female of selenophora, as it has a distinct dark brown 
spot at the base of the hind wing below, which is also 
present in the male, but not in orientalis or opalina; 
and, though the males of selenophora, as well as zeroca, 
are very different from their females above, and want 
the white band on the body which is found in other 
species of the genus, yet they agree very well on the 
under side with what we have no doubt are their females. 
A. orientalis is found in the forest at 2—7000 ft. 
elevation from April to October, but is not common, and 
is difficult to take, as it settles on high trees, and only 
descends to the ground at long intervals, 
