MAMMALIA* ' 31 
'^.(pp. 434-436) the genus Tamias, adding the synonymy, and 
proposing the following arrangement ; — 
I, Without cheek-pouches. Fur soft, consisting of fusiform hairs and a 
soft undor-fur. Ears ovate. Tree-Squirrels. 
A. Limbs free, -without parachute. 
a. Incisors with close longitudinal grooves. 
1. Rheithrosciurus, g. n., p. 271 j type Sciurus macrotis (Gray). 
h. Incisors smooth. 
2. Sciurus, Ears pencilled j nose rounded; tail longer than body. 
8. Macroxus. Ears covered with short adpressed hairs ; nose short, 
blunt ; tail longer than body. 
4. Rhinosciurus. Ears covered with short adpressed hairs; nose 
acute, produced ; tail longer than the body. 
B. Limbs enclosed in skin, forming a parachute. 6. Sciuropterus. 
II. Without cheek-rpouches. Fur short, rigid, with flat channelled spines, 
without any under-fur. Ears rounded, scarcely raised. Ground- 
Squirrels. 6. Xerus (pp. 271 & 832). 
^IIJ. With distinct cheek-pouches. Bun’owing Squirrels. 7. Tamias. 
Sciurus. Dr. Gray (1. c.) subdivides the species according to size, length 
of tail, arrangement of the hairs of the ear, and coloration ; he characterizes : — 
nine Asiatic species, new being Sc. leucocephalus, p. 273, and Sc. historicusj 
from Syria, p. 273 ; two African species, p. 326 ; six American species. 
Sc. hyporrhodus^ from Santa F4 de Bogota, being new, p. 419. 
^ M. A. Milne-Edwards describes the following new species of Sciurus in 
Rev. et Mag. Zool. 18G7 : — Sc. germanii, p. 193, Island of Poulo-Oondor ; Sc. 
hocourtii, p. 193, Siam ; Sc. griseimanus, p. 196, Oochinchina ; Sc. leucogastcr^ 
p. 196, Siam ; Sc, davidianus, p. 197, Peking ; Sc. pyrrhocephahlSj p. 226, 
Oochinchina; Sc, (Tamias) dussumierii,^. 220, Malabar; Sc, (Tamias) rodoU 
p. 227, Oochinchina; Sc. olimceuSj p. 228, West Africa; Sc. auhryi^ 
p. 228, Gaboon ; Sc. (Xerus) ^flavus, p. 229, Gaboon; Sc. pernyi^ p. 230, pi. 19, 
S^tcheuen in Ohina. 
Sciurus arizonensis, sp. n., Ooues, Amer. Natur^i. 1867, p. 367. Forma et 
coloribus corporis Sciuro carolinensi similis ; sed minor (body 9*6 inches, tail 
to end of vetebrse 9‘6 inches), cauda longiore, latiore, siibtus distincte tri- 
colorata (tail tricolor below, being centrally tawny, bordered with black, 
which is in turn fringed with white). — A detailed description is given. 
From Arizona. 
Sciurus getulus (L.)=Aen/5 trivittatus (Gray). Sclater, Proc. Zool. Soc. 
1867, p. 817. 
,>J 3Iacroxus. Dr. Gray (1. c.) subdivides the species according to size and 
coloration and the width of the incisors. He characterizes 38 Asiatic 
species, new being: — M. (Callosciurus) sarawahensis^ p. 277 ; M. (Palmista) 
layardi, from Ceylon, p. 280 ; M. similis, from Nepal, p. 281 ; M. inornatus, 
from the Laos Mountains, p. 282 ; M. leucopus, from Gambogia, p. 282 ; 
M. pluto, from Borneo, p. 283 ; M. punctatissimus, p. 283. 14 African 
species, new being : — M. shirensis, from East Africa, p. 327 ; M. isabellinus, 
from West Africa, p. 329. 33 American species, new being: — M. nicoyanus, 
from Costa Rica, p. 423 ; M. morio, p. 424 ; M. maurus, from Oaxaca, 
'p. 425; M. melania, from Point Berica, p. 425; M, neglectus, p. 426; M. 
