382 Mr. O. Thomas on new 
Cerdocyon tucumanus, sp. 0. 
Allied to the large C. mimaz, but lighter-coloured throughout. 
Size practically as in mimaz, therefore larger than in 
brasiliensis. General colour above clear grizzled grey, with 
less fulvous or clay-coloured suffusion than in mimaz. Under 
surface lighter throughout, the chin brown instead of black, 
the throat whitish, succeeded by a pale instead of dark brown 
band ; chest white, belly soiled whitish instead of the strong 
clay-colour of mimax ; inguinal region white. Back of ears 
dull clay-colour instead of black. Hands and feet brown 
grizzled with white, instead of being almost wholly black. 
‘Tail very bushy, the light ends and subterminal bands of the 
hairs conspicuously whitish, in marked contrast to the sordid 
clay-colour found in mimaw. 
Skull very similar to that of mimaz, though a little smaller, 
but still decidedly greater in length than that of brasiliensis 
and the other species. Nasals surpassing the premaxilla 
posteriorly, falling short of them in the one specimen of 
mimax. Bulle comparatively large. 
Molars large, about as in mémaz, larger than in brasiliensis. 
Dimensions of the type :— 
Head and body 632 mm.; tail 340; hind foot 14]; 
ear 74. i 
Skull: greatest length 145; condylo-basal length 143; 
zygomatic breadth 78; nasals on middle line 48 ; interorbital 
breadth 26 ; intertemporal breadth 31; postorbital process to 
deltoid ridge 66; breadth of brain-case 47 ; palatal length 70. 
f* on outer edge 13 ; combined length of m! and m? 19°5 ; 
greatest diameter of m! 14. 
Hab. Neighbourhood of Tucuman. Type from Vipos, 
alt. 500 m. Another specimen from Tapia. 
Type. Adult female. B.M. no. 21.1.5. 29. Original 
number 1203. Collected 11th October, 1920, by E. Budin. 
Presented by Oldfield Thomas. 
Readily distinguishable from other forms of Cerdocyon by 
its light under surface and more whitish tail. 
Cerdocyon thous jucundus, subsp. n. 
Coloured like C. ¢. brasiliensis, but skull shorter, stouter, 
and heavier, 
External appearance very much as in brasiliensis, the colour 
consequently darker than in é¢ucumanus. Under surface 
