84 Mammals of Eastern Asia 
paler beneath. The braincases are rather high and longitudinally 
crested like some Eptesicus. All may be races of the typical 
species M. my oils. In eastern Asia the Bats are represented by 
several races : dobsoni from the Himalayas, sicarius from Sik- 
kim, luctuosus from Szechwan, ancilla from Shensi, chinensis 
from "China." 
The Large-footed Mouse-ear Bats, subgenus Leuconoe, 
which include Daubenton's and Cappaccini's Bats of Europe and 
the North American Myotis grisescens, form a large, well- 
developed, chiefly south Asiatic group, more closely confined to 
the tropics than are the Whiskered and Natterer's Bats. They 
are distinguished by the greater size of the hind foot, which is 
two-thirds the length of the shank instead of one-half or less. 
It is larger only in Rickettia. Some species have the interfemoral 
membrane furry as in Murina, a. member of a different Vesper- 
tilionid subfamily. Leuconoe comprises about five species 
groups, the most northern of which is the daubentonii group, 
represented in eastern Siberia and Korea (Kuroda) by ussu- 
riensis and in Fukien by laniger and fimbriatus. The forearm is 
from 1% to 1% inches, the color dusty gray-brown. In the 
neighborhood of Pekin there is a slightly smaller species, M. 
davidii, and a larger one, M. pequinius, with the length of the 
forearm 2 inches. The central group of Leuconoe, tropical and 
subtropical in range, with its typical species M. adversus of 
Java, is represented in the foothills of the Himalayas and 
Tonkin by longipes, in Siam by continentis, in Japan by macro- 
dactylus, and in Formosa by taiwanensis. The forearm in the 
adversus group is about 1 % inches in length. 
In Europe, Daubenton's Bats are called Water Bats, from 
their habit of dipping to the surfaces of pools and tanks to drink. 
Rickett's Mouse-ear Bat, subgenus Rickettia, is unique ; the 
single specimen, Myotis ricketti, is of uncertain though probably 
Chinese origin. It is extremely large-footed; the length of the 
foot is approximately equal to the length of the tibia. In this 
