6 
SPOLIA ZEYLANICA. 
Faunal Resemblances. 
As the geographical distribution is given under each species, I do 
not propose to enter into the subject here. Of the thirty-seven 
species enumerated, however, twelve (or 32 per cent.) are at present 
only known from Ceylon ; seventeen (or 46 per cent.) are wide- 
ranging forms which occur in at least two other localities ; four 
(or 11 per cent.) have only been found hitherto in the Khasi Hills 
(Assam) ; and Java, India, the South Indian Hills, and Australia 
each produces one species which is only known otherwise from 
Ceylon. 
At present we know too little of the distribution of the Ptero- 
phoridae in general to permit of any useful deductions being drawn, 
but a point which has especially struck me is the great resemblance 
shown by the plume fauna of Ceylon to those of the Khasi Hills 
(Assam) and Java. The fact of finding such forms as P. citropleura 
and A. melanopoda in localities so widely separated as the Khasi 
Hills and the central districts of Ceylon seems to me either to argue 
the immense antiquity of a specific existence which reaches back 
to a time when Ceylon and Assam were connected (if ever they 
were) or else to point to the wonderful powers of dispersal (? by 
the monsoon winds) possessed by these little moths. The latter 
supposition appears the more probable. 
Acknowledgments. 
One of the most pleasing duties in writing a paper like the present 
lies in the fact that some acknowledgment can be made for the 
many instances of help freely rendered by friends and corre¬ 
spondents. To Mr. E. Meyrick my thanks are due for the ready and 
courteous way in which he has replied to the innumerable queries 
which have arisen in working at this subject away from type- 
collections and libraries ; his published papers must also form the 
basis of all work on the plume moths of India and Ceylon. Messrs. 
E. E. Green, W. Vaughan, J. Pole, F. M. Mackwood, W. Ormiston, 
and 0. S. Wickwar have most generously helped with specimens 
collected by themselves, and I am also indebted to Mr. G. B. de 
Mowbray, who kindly sent me his collection for inspection. Dr. J. 
C. Willis has assisted most substantially by the identification of the 
various plants on which larvae have been found. 
Synoptic Table of Genera of the Pterophoridae of 
Ceylon. 
c Wings not fissured 
* [ Wings fissured 
c Outer margin of f.w. not falcate 
^ i Outer margin of f.w. strongly falcate 
.. 2 
.. 3 
.. Agdistis 
. . Steganodactyla 
