28 
120. WHITE-FOOTED MICE, from the Black Hills (Sztomys amert- 
canus arcticus) and the adjoining plains to the eastward (S. a. 
nebracensts.) 
121. Specimens of the VARYING HARE (Lepus americanus ), show- 
ing seasonal change of color by moulting. (See Bull. Am. Mus. 
Nat. Hist., vi., 1894, pp. 107-128.) 
Miscellaneous. From American Museum of Natural FAitstory. 
122. MURINE OPOSSUM (Didelphys murina) and young, from the 
island of Trinidad. Among the smaller species of Opossum 
are some in which the female has the external abdominal 
pouch but slightly developed, while in others it is entirely 
wanting. The young, however, as in the fully pouched 
species, are born at a very early stage, and are at once trans- 
ferred to the nipples of the parent, to which they remain 
attached until fully developed. 
123. A series of MOTMOTS (Momotus ceruleiceps ), showing stages 
in the mutilation of the tails. The Motmots, of which some 
eighteen species are found in tropical America, are remarkable 
among birds for their habit of trimming their central tail- 
feathers. 
124. A mounted specimen of the QUEZAL OR PARADISE TROGON 
(Pharomacrourus paradiseus), showing the effect of continued 
exposure to the light. 
125. A SKIN of the same species, which has been preserved in a 
cabinet. 
126. Specimens of the eastern and western HIGH-HOLES OR 
FLICKERS (Calaptes auratus and C. cafer). Showing typical 
examples of both species and hybrids between the two. Where 
the boundaries of the ranges occupied by these two species 
adjoin, they apparently hybridize. (See Bull. Am. Mus. Nat. 
Fizst., vol. iv., 1892, pp. 21-44.) 
127. Specimens of the SAME SPECIES illustrating the variations 
in the marking of a single feather. (See Bull. Am. Mus. Nat. 
FTist., vol. iii., 1891, pp. 311-313.) 
