AOTUS. 729 
BY TO THE SPECIES: 
A. Upper parts ashy tinged with rufous, beneath PAGE 
Llc ise i oa BOSE ae ites en ee AL a aire eae A.rufipes 7 
B. Upper parts pale brown, beneath ochraceous. .A. voctferans 729 
Fig. CXXXIX. AOTUS RUFIPES. 
681. rufipes (Nyctipithecus), Sclat., Proc. Zodl. Soc., 1872, p. 3. 
RuFOUS-FOOT SQUIRREL MONKEY. 
Type locality. San Juan del Norte, Nicaragua. 
Geogr. Distr. Nicaragua. Limits of range unknown. 
Genl. Char. Colors pale; hands and feet rufous. 
Color. Upper parts ashy tinged with rufous, under parts rufous; 
three black stripes on head, one from between eyes to forehead, and 
one on each side to above ears; hands and feet rufous; tail rufous at 
base, becoming blackish at tip. 
Measurements. Total length, 685; tail, 405. 
682. vociferans (Nyctipithecus), Spix, Sim. et Vespert. Bras., 1823, 
a5) pl XG. 
Noisy SourrreL Monkey. Mzico-dormilon in Colombia. 
Type locality. Tabatinga, Upper Amazon, Brazil. 
Geogr. Distr. Costa Rica, Central America, to Brazil. 
Color. Space around eyes and nose naked, brown; a dark brown 
stripe from side of crown encircles the eyes; white band above eyes; 
a blackish brown spot on forehead; sides of neck black; upper parts 
pale brown; tail ferrugineous at base, grading into blackish on apical 
third; throat, breast, and abdomen ochraceous. 
Measurements. Total length, 950; tail, 530. 
