PEEFACE. 
V 
The author has been compellerl to omit from the list of Ceylonese Heterocera the species 
which the late Mr. F. Walker described from Mr. E. L. Layard^s collection in the British 
Museum ' Catalogue/ the types of which, however, were never in the Museum. These insects 
were placed by him in families and genera to which they have no relation whatever, and the 
specimens having been lost for over twenty years (as Mr. Layard informs me), tliere is 
scarcely any hope that the species will ever be recognized. They will be found enumerated 
in a separate list, as well as a few species named by T. Nietner The Coifee-trec and 
its Enemies,' Colombo, 1880), of which likewise the descriptions are quite insufficient. 
A few of the Plates had been executed or printed before the manuscrijit of the text 
was sent to press. As some additional materials had been received in the interval, the 
nomenclature of some of the species was revised, and some changes were adopted in the text, 
which are duly indicated in footnotes. 
Our best thanks are due to the generous donors whose names have been mentioned 
above ; to Mr. F. Moore, who has given to the author every assistance in allowing him free 
access to his large collections of Ceylonese Lepidoptera ; and especially to Mr. Hampson, 
who has spared neither time nor labour in the preparation of this Monograph. 
ALBEET GUNTHEE, 
Keeper of the Department of Zoology. 
Britisli Museum, N. H., Dec. 19, 1892. 
