398 L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. [No. 3, 
from A. vesta , Eabricius, from the Himalayas, Assam, Upper Burma 
and Java in having tlie ground-colour more oclireous (less tawny), and 
all the veins more heavily defined with black. Forewing has a broad 
costal black margin reaching the subcostal nervure ; the outer margin 
has the black border nearly twice as broad, with the marginal series 
of spots of the ground-colour obsolete or entirely absent. Ilindwing has 
the black margin much broader, with the yellow marginal spots very 
much smaller. Underside, both wings differ only in having all the veins 
more strongly defined with black. 
Occurs only on the Central Plateau, where it appears to swarm to 
the same extent as the allied species does in Sikhim and elsewhere. 
Ur. Martin has had the larva and pupa brought to him by his collec¬ 
tors. It flies all the year round, and there is often an over population, 
after which it becomes somewhat scarce for a while till it recovers itself 
and again becomes common. 
Subfamily Nymph alike. 
122. Ergolis ariadne, Linnaeus. 
Snellen. Wallace. Hagen. Distant. This species may be known 
from the one that follows by its richer brighter tawny coloration, by 
the outer margin of both wings being much more irregular, and in the 
male by the “ male-mark ” present on the underside of the forewing, 
which, in this species, is a solid shining deep black patch reaching 
from near the inner margin to the third median nervule. Its larva feeds 
on the stinging creeper, Tragia involucrata. The butterfly is only found 
in the forest from Bindjei to Bekantschan, and always near its food 
plant. It has a low flight, only males when fighting fly high in 
the air. 
123. Ergolis isjhts, Wallace. 
E. isseus, Wallace, Trans. Enfc. Soc. Lond., 1869, p. 333, n. 4. 
Wallace. Kirby. Hagen as taprobana. Distant. Nearly allied to 
but quite distinct from F. merione , Cramer. The outer margin of both 
wings is much more even and regular than in the preceding species, 
and the coloration is duller and darker. The “ male-mark ” is in a simi¬ 
lar position, but is very inconspicuous and consists of a broad line of 
modified black scales extending along either side of the veins on the disc 
of the forewing on the underside, but not reaching the outer margin nor 
the costa. F. merione has a quite different “ male-mark,” which is similar 
to that in F. ariadne , Linnaeus. I have specimens of F. isseus from 
Myitta in Burma and from Singapore ; Wallace records it from Singapore 
