916 
NACADUBA. By Dr. A. Seitz. 
doninct. 
superdates. 
felderi. 
caliginosa. 
glauea. 
aluta. 
nanda. 
lessina. 
datarica. 
coelestis. 
philiccta. 
alutina. 
gracilis. 
dana. 
ardeola. 
subdnbiosa. 
hampsonii. 
deliana. 
ni. 
darker purple violet than Indians from Java, Nias or India; $ small, above quite black with a small fine tail. 
-—- donina Snell, from Java and the Lesser Sunda Islands occurs in 2 forms (seasonal dimorphism?), one of 
which — donina — has a yellow under surface, whilst that of superdates Snell, is steel-grey. — felderi Murr. 
flies in Australia from Sydney to Cape York; above brown with a violet lustre, the <$ at the base darker, the 
$ there dusted with a bluish white, the $ also marked with a bluish white in the anal region of the hind¬ 
wing beneath, almost exactly as in typical nora. This is probably identical with or scarcely different 
from the Queensland form maclcayensis Misk. and dubiosa Sernp. — caliginosa Drc. finally is the smallest race 
known, still smaller than specimens from Malacca; from the Bismarck Archipelago and the Salomons. 
f_j N. glauea Snell, is much larger than nora, but the bands beneath like in the latter. Under surface 
light grey. From Java. — nelides Nic. is stated from Sumatra and Java. But as the species is represented 
in Java by glauea in the typical form, it is doubtful whether this form is more than an insignificant subordinate 
race. 
N. aluta Drc. (154 b) is a beautiful though not large species, the $ above violet-blue, the Q in the 
proximal parts of the wings lustrous blue, the dist inctly banded under surface of which makes the dark undulate 
bands show through above in blackish nebulous bands. The typical form flies in Borneo. — nanda Nic. from 
Sumatra scarcely differs from it. — lessina Fruhst. from Nias is larger than the Sumatran form, and the $ is 
above lighter violet. Beneath the large honey-coloured halo at the subanal eyespot is remarkable. — datarica 
Snell, from Java seems to be rare there; similar to the Sumatran race, but the upper surface still lighter and 
more intensely lustrous than that of lessina. — coelestis Nic. inhabits Continental India from the Himalaya 
to Assam and Burma, and according to De Niceville it also occurs in the Andamans. This is the largest of 
all the aluta- races, recognizable by the bands beneath filled up with blackish-brown instead of grey. — philiata 
Fruhst. are of the size of the specimens from Nias; the black distal margin is more distinct than in the Borneo 
race of aluta. The $ shows on the hindwing above another row of small whitish antemarginal crescents; from 
Bazilan, Samar, and perhaps yet from other Philippine Islands, and from Palawan. -— alutina Fruhst. Upper 
surface of a beautiful dark purple violettish-blue, like in viola (154 c), but both wings with a very broad, darkened 
marginal zone, which is not present in viola. Under surface darker blackish-grey than in Borneo-specimens 
and also in continental specimens. —- gracilis has not such pointed forewings as viola- $; $ above dark greyish- 
blue, with a faint lustre. Hindwing with a subanal eyespot somewhat showing through above; under surface 
greyish-brown, the markings slightly darker than the ground-colour; the subanal eyespot of the hindwing 
proximally red-brown, distally whitish. Expanse 23 mm. From Ceram; presumably also occurring in Amboina; 
Fruhstorfer presumes that the Amboina specimens of this species are those understood by Felder by the 
undecipherable names of calauria, helicon or panorrnus. — The dd of this species are often met with near water, 
whereas the $$ keep hidden in bushes. Thereby Niceville explains the fact that among the numerous speci¬ 
mens he obtained were only dd and not one $. 
N. dana Nic. This small species has no tails, but very round hindwings.' On the under surface the 
light transverse markings are scarcely necognizable. The species is distributed through India, almost from the 
palearctic frontier to Palawan in the east and New Guinea in the south. The specimens from different habitats 
almost only differ by the colouring; typical specimens are from Continental India, being in some places of the 
Himalaya (Sikkim, Kumaon) and of the Nilgiris not rare (at least the <$<$); they have a light violettish-grey 
upper surface. — ardeola Stgr. are specimens from Palawan with a darker upper surface. — The darkest are 
those from New Guinea from the Snow Mountains, taken at altitudes of 4 to 6000 ft. This is the form subdubiosa 
Bothsch. — In all the 3 forms the under surface shows rather the same marking, the basal bands (according 
to Bingham) not extending down to the proximal margin but ending yet before the median. 
N. hampsonii Nic. is so very similar to the preceding that Fruhstorfer thinks it possible that 
it belongs to one of them as a season form. This, however, is little probable since both occur rather at the same 
time near Utacamund, an alpine resort in the Nilgiri Hills, hampsonii differs from viola (154 c) in the male only 
by the clearer colouring, the much less pointed forewings and the more circular, tailless hindwings, as well as 
by the bands beneath not showing through above. Beneath one of the bands (in the forewing postmedian, 
in the hindwing median) is darker brown, and the subanal eyespot is merely a moderately thick black dot. 
N. deliana Snell, is recognizable by the hindwing beneath exhibiting the 4 intramedian black ocelli 
doubly pupilled silvery; it originates from Rembang on the northern coast of Java. 
N. ni Nic. (154 c) differs very much from the preceding. It has the wings shaped as the of viola 
(154 c), but the hindwings without tails, unless the small tails in the figured specimen were lost. Recognizable 
by the under surface being yellowish earthy-brown, the lighter strokes rather exactly parallel, particularly 
in the hindwing, where they begin from the costa and nearly all disappear before the median. The species occurs 
in Sumatra and Java and seems to be rare. 
