48 SPOLIA ZEYLANICA. 
Weather seems to have little to do with the variations, as 
the most extreme forms fly together. They can be taken all 
the year round at Haldummulla, but are easiest to capture 
in the wet months. ‘The males settle on wet roads in abund- 
ance in April; May, October, and November. The females 
visit flowers, or settle on low bushes, showing a preference for 
bare projecting twigs. They flight in large numbers many 
times in the year. 
A curious flight appeared for a day or two in September, 
1915, viz., at the end of the dry season. The insects only 
measured 18-22 mm. in expanse, but in colour and markings 
were what I understand to be plumbeomicans. A dwart 
variety of the white female (prominens) is not rare here, and 
I have received it from Ratnapura. 
I have taken single specimens at Galle and Dambulla, but 
the group seems to be mainly confined to the hills, from 
500 to 5,000 feet. 
** Taken at Colombo ” (F. M. Mackwood). 
96. NACADUBA ARDATES, tailed form; Nacaduba nora, 
f E.—Found in India, Malaya, and Australia. 
97. NACADUBA ARDATES, tailless form; Nacaduba noreia, 
K.—Evans writes : “‘ I believe with various other writers that 
nora and noreia are separate species ; nora, the tailed form, is 
also yellow below.” 
Personally I am of opinion that the two forms are at least 
as fully entitled to rank as distinet as, say, atrata and plumbeo- 
micans, but I agree with Bingham and De Niceville in thinking 
that the tailless form does not answer at all to Felder’s 
description of noreia, which Eeonsider quite a distinct species, 
Apparently nora should stand for the tailed form and ardates 
for the tailless. 
It is hard to define any difference between them, but the 
post discal pair of strige usually appear to be nearer the 
terminal margin in the tailless form, and sometimes even 
touch the sub-terminal markings. The bands enclosed by the 
strige also seem comparatively broader. I have never yet 
seen the variety of the female with the yellow under side 
without tails, and in both sexes the tailed form is the most 
variable in the ground colour of the under side. 
