PREFACE. 
The nintli part of the ' Illustrations ' is devoted to the Macrolepidoptera Heterocera of 
Ceylon. It is divided into two portions ; — 
1, A systematic list of all the species known at present, with enumeration of the 
localities in Ceylon from which they have been recorded, and Avith references to the literature 
supplementary to those given in F. Moore's ' Lepidoptera of Ceylon ' and in Cotes and 
Swinhoe's ' Catalogue of the Moths of India.' 
2. The descriptive portion, which contains diagnoses of all the species figured. In 
accordance with the principal object of the work, the figures are restricted to those species of 
which the types are preserved in the British Museum, and which are described either now 
for the first time, or were published in previous works, provided that the types have not been 
already satisfactorily figured elsewhere. If the same plan were methodically carried out in 
other Museums and Collections containing types of published species, much labour and error 
would be spared to the student, and much confusion avoided in nomenclature. Many 
Walkerian species have been re-examined and are figured in the present part. 
The greater portion of the materials for this contribution to the Ceylonese Fauna was 
obtained from a fine collection formed by Mr. E. E. Green, the whole of which he offered to 
the British Museum on the condition that the Trustees would publish the descriptions of the 
new species in a part of the ' Illustrations.' This proposal was agreed to, Mr. Green's 
Collection being subsequently largely supplemented by a liberal gift of specimens selected 
