LOO SCIURUS. 
Measurements. ‘Total length, 290; tail vertebra, 105; hind foot, 
35; ear from crown, 9. Skull: basal length, 29.5; palatal length, 14.2; 
interorbital width, 13; zygomatic width, 22; length of upper molar 
series, 6. 
69. browni (Sciurus), Bangs, Bull. Mus. Comp. Zo6l]., xxx1x, 
1902, P. 24. 
BROWN’S SQUIRREL, 
Type locality. Bogava, Chiriqui, Panama, 
Genl. Char. Size small, pelage rather harsh, thin. 
Color, ‘‘Upper parts a fine mixture of tawny olive and bistre, 
produced by the dark brown bases and tawny olive tips of the hairs; 
nose, forehead, and orbital ring tawny; tail with the hairs dark red- 
dish brown basally, then black and tipped with grayish white; a 
small, black pencil; under parts dull gray to grayish white, slightly 
washed with buffy or yellowish in some specimens (very slightly in 
the type on under side of neck and middle of belly); under sides of 
legs darker—more nearly like upper parts.” 
Measurements. 
hind foot, 36-38; ear, 13-14. Skull: type, basal length, 29; occipito- 
nasal length, 36; zygomatic width, 21.2; interorbital width, 12.4; 
palatal length, to palatal notch, 13.4; to end of pterygoids, 20.2; 
length of nasals, 11; length of upper molar series, 5.8.’’ (Bangs, 1. c.) 
i BY 
otal length, 232-260; tail vertebra, 110-120; 
70. boquetensis (Sciurus), Nelson, Proc. Biol. Soc. Wash., Xv, 
1903, Pp. 14%. 
CHIRIQUI PIGMY SQUIRREL. 
Type locality, Boquete, Chiriqui, Panama, altitude 6,000 feet. 
Genl, Char. Pelage soft, thick, woolly; tail slender, flat. Skull 
long and narrow; braincase arched, 
Color. Upper parts, sides of body, and upper surface of arms and 
legs olivaceous brown, shaded with yellowish; chin and throat dingy 
rusty; under side of neck and breast rusty rufous shading into dull 
grizzled brown; tail above and below dull tawny olive, washed and 
tipped with black and edged with pale yellowish; hands and feet 
washed with rusty reddish. 
Measurements. Total length, 257; tail, 116; hind foot, 37; 
(dried skin.) Skull: palatal length, 15.5; interorbital breadth, 14; 
length of upper molar series, 7. 
B, Baiosciurus. 
Premolars, *—*, Skull long and slender; braincase arched; ros- 
trum broad, about equal to interorbital breadth; audital bulla small. 
