Cj lisse) 
The number of genera found in the Himalayas, but not 
as yet in China, is greater ; but it must be remembered that 
a large part of the very centre of this region, including the 
head waters of the Irrawaddy, and the greater part of the 
south-western provinces of China, are as yet quite unex- 
plored. Most of them are Lycenide of Malayan type. 
Among them, perhaps, the following may be mentioned, 
and of these, the first two only are confined to the Himalayas: 
Anadebis, Orinoma, Zipatis, Elymnias, Penthima, Neurosiyma, 
Allotinus, Miletus, Nacadaba, Horaga, Cheritrella, Pontia, 
Prioneris, Hebomoia and Eronia. 
Of typical Malayan genera, not found in the Himalo- 
Chinese sub-region, the following are the principal :— 
Hestia, Idaopsis, Erites, Zeuxidia, Xanthotenia, Prothoé, 
Terinos, Rhinopalpa, and several genera of Lycanida, 
The boundaries of this sub-region are extremely indefinite, 
as they depend greatly upon altitude, the region being essen- 
tially one of considerable elevation. So far as we know at 
present its outlying districts in the high mountains of the 
Malay Peninsula, Borneo, Sumatra, and Java, are not as well 
distinguished by peculiar mountain forms of butterflies as they 
are by birds. Formosa, of which we know almost nothing, is 
an island which would probably now repay the exploration of 
an entomologist better than any other in the Hastern Seas, 
and the recent discovery of a species of Hestia, so far north as 
the Liukiu islands, shows that there is much of interest to be 
expected there. 
The division between the Indo-Malayan and Austro- 
Malayan regions laid down by Wallace, and which has since 
been generally accepted by zoologists as ‘ Wallace’s line,’ is 
much less marked in butterflies than in birds or mammals, and 
the few traces of an Australian element, which are found to 
the west of this line, are comparatively unimportant. 
In Java, Mr. Snellen, who is now engaged in a work on 
the Lepidoptera of this island, informs me that though there 
is a difference between the butterflies of East and West Java 
yet it is not strongly marked. The greater part of the species 
are spread over the whole island. Papilio Van de Polli, Pap, 
Now, Prioneris philomene, Delias Peribaa, Cethosia Lamarckii, 
