480 L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. [No. 3, 
discal orange band of the female; the wing is also narrower and the 
outer margin straighter. Underside, both icings as in the female. 
Grose Smith. In Sumatra it occurs rarely in the Battak mountains 
and at Selesseh in July, August and October. 
482. Biduanda thesmia, Hewitson. 
Grose Smith. Staudinger. Distant. Very common in the forests 
from the plains to the elevation of Bekantschan, and occurs all the year 
round. Both sexes rest on the buds of some moderately high shrub, 
with the head mostly downwards. It occurs exactly in the same locali¬ 
ties and is quite as common as Marmessus moorei , Distant, which it 
greatly resembles. If one species mimics the other it would be difficult 
to say which is the model and which the one that copies it. 
483. ^Biduanda estella, Hewitson. 
Hewitson. Grose Smith. Kirby. Both sexes originally described 
from Sumatra. As Hewitson does not mention any secondary sexual 
characters in the male, and the inner margin of the forewing as des¬ 
cribed and figured is straight instead of bowed outwardly, it is more 
thau probable that it does not come into the genus Biduanda , as that 
genus possesses male secondary sexual characters, but in the absence of 
specimens I do not know where else to place it. 
484. Biduanda soeva, Hewitson. 
Originally described from Singapore. In Sumatra it is found only 
in the mountains at higher elevations, where it flies throughout the 
year, as Dr. Martin possesses specimens from every month. It must 
be very common under favourable conditions, as one collector once 
brought in a consignment of sixty specimens. The female is very rare. 
485. Biduanda nicevillei, Doherty. 
First discovered in Burma. Very rare in the Battak mountains, 
Dr. Martin possesses three females only taken in January, March and 
December. Dr. Martin thus describes his specimens, the female being 
hitherto unknown. “Female. Expanse: F35 inches. Upperside, 
forewing brown, in the middle somewhat brighter, more reddish. Cilia 
dark brown. Hindwing with two subanal black spots, somewhat con¬ 
fluent, bordered inwardly by a large pure white area which occupies 
the posterior half of the wing; a fine anteciliary black line. Cilia 
white. Tails three, white. Underside, both wings as in the male.” 
486. Biduanda cinesioides, de Niceville. 
Originally described from the Malay Peninsula. Is not as rare as 
