AOTUS. 



KEY TO THE SPECIES. 



A. Upper parts ashy tinged with rufous, beneath PAGE 

 rufous A . rufipes 7 2g 



B. Upper parts pale brown, beneath ochraceous. .A. vociferans 729 



FIG. CXXXIX. AOTUS RUFIPES. 



681. rufipes (N yctipitliecus) , Sclat., Proc. Zool. 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, 



p. 25, pi. 19. 

 NOISY SQUIRREL MONKEY. Mico-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. 



