o0 THE BUTTERFLIES OF CEYLON 
Again an important division depends on whether the 
basal pair of strige are continued below the median vein. 
I have a series of tailed avdates, otherwise quite normal, 
showing every graduation from the strigz stopping at the - 
median vein till they reach vein I. 
Judging from Fruhstorfer’s revisionmy nomenclature of 
the atrata group(b5.) is quite correct as regards the females, 
but very wrong in the identification of the males. I refer 
to this later when dealing with the individual species. 
-88. NACADUBA PACTOLUS CEYLONICA, Fruh. Nacaduba 
macropthalma, M. 
Fruhstorfer says that an examination of the genitalia 
proves that macropthalma of the Nicobars, and pactolus of 
the Moluccas are races of one species, and that pactolus is by 
two years the older name. He states that races of pactolus 
are found in India and Malaya, and from Ceylon to the 
Solomon Islands, Formosa, and Amboina. He divides the 
Indian races into macropthalma from the Nicobars, anda- 
manica from the Andamans, ceylonica from Ceylon, a new 
sub-species, unnamed, from S. India, and continentalis from 
Sikkim, Bhutan, Assam, and Burma. I have two specimens 
of macropthalma $ from the Nicobars, and consider them 
quite a distinct race from ours. A specimen from the Anda- 
mans is very like ours. Fruhstorfer distinguishes our race 
by the grey black colour of the under sides. In all my speci- 
mens it is rather pale brown; the grey black form may be 
seasonal. 
Taking the average iti; our largest Nacaduba, one of my 
males being 39 mm. in expanse. The female usually has 
the blue area very large, the veins are clearly marked and 
there is a disco-cellular streak on both wings. 
I have found it very rare and local and after over 30 years 
collecting have only a poor series of 12 specimens, from 
Haldummulla, Wellawaya, Ratnapura, and Kandy. 
89. NACADUBA PAVANA NABO. Fruh. N. pavana, B. 
Was originally described by Horsfield from Java. The type of 
pavana is in the British Museum, but, being 100 years old, is 
