INTEODUCTION. 
xxiii 
species. lu 1881 ('Annals and Magazine of Natural History '), the same 
writer gave a list of 130 species collected by Maries in the neighbourhood of 
Nikko, Central Japan, many of which Avere described as new. In the ' Pro- 
ceedings of the Zoological Society,' 1881, there is a paper by Butler on the 
Butterflies observed in Hokkaido [Yesso] by Fenton, and descriptions of some 
new species. Janson, in the ' Cistula Entomologica,' 1877, described the new 
species in the collection obtained by Jonas in Japan; and in 1878 he made 
some remarks, in the same volume, on Japanese Butterflies and described 
five new species. In 1883, H. Fryer published, in the 'Transactions of the 
Asiatic Society of Japan,' a catalogue of the Lepidoptera of Japan, in which 
130 species of Rhopalocera are enumerated, and a supplement to this list 
was published in 1885. During the years 1886-1889 he produced his larger 
work entitled ' Rhopalocera Nihonica, a description of the Butterflies of 
Japan.' This volume is illustrated by ten plates, executed by native artists. 
In 1887, the present writer contributed an annotated "List of the Butterflies 
of Japan and Corea " to the ' Froceedings of the Zoological Society ;' and in 
the same year Fixsen (Rom. sur Lep. iii.) wrote on a collection formed by 
Otto Herz in Western and Central Corea. 
Elwes, in the 'Froceedings of the Zoological Society,' 1881, published a 
most important paper on the Butterflies of Amurland, North China, and 
Japan, in which he brought together, from various sources, all the information 
lip to date of writing as to the distribution &c. of the species known to occur 
in these countries. 
In addition to the works mentioned above, the following will be found of 
use to the student of the Rhopalocera of Eastern Asia : — 
' Butterflies of India, Burmah, and Ceylon,' vol. i., by Marshall and 
DE NiCEViLLE; vols. li. and iii., by Lionel de Niceville, 1882-1890 
(other volumes to follow). 
' Lepidoptera of Ceylon,' by F. Moore, 1880. 
' Lepidoptera Indica,' by F. Moore, 1890-1893 (stiU in course of publica- 
tion). 
'Rhopalocera Malayana,' by W. L. Distant, 1882. 
d'2. 
