406 DASYPROCTA. 
Measurements. Total length about 430; hind foot, go. Skull: 
occipito-nasal length, 108; greatest zygomatic width, 50; mastoid 
width, 46; length of Hensel, 79; palatal length, 14; length of upper 
tooth row (crown), 19; length of frontals, 40; height of lower jaw at 
condyle, 28. 
423. callida (Dasyprocta), Bangs, Am. Nat., Xxxv, 1901, p. 635. 
CUNNING AGOUTI. 
Type locality. San Miguel Island, Bay of Panama. 
Genl. Char. Color pale; rump hairs white-tipped. Skull slender; 
rostrum long; nasals narrow. 
Color. Upper parts with the hairs annulated with yellowish and 
black, giving a yellowish clay as the general color; more ochraceous 
in middle of back; rump hairs long, black with white tips; under 
parts soiled white, hairs annulated with drab; fore and hind feet 
brownish black. 
Measurements. Total length, 420-510; tail vertebrz, 20-30; 
hind foot, 96-105; ear from notch, 33-38. Skull: basal length, 85.4; 
occipito-nasal length, 98.6; zygomatic width, 44; mastoid width, 32; 
interorbital constriction, 26.2; length of nasals, 38; width of nasals, 
Fic. LVI. DASYPROCTA ISTHMICA. ISTHMIAN AGOUTI. 
