634 Bulletin American Museum of Natural History. [Vol. XXXIV. 
The long rump hairs indicate that aurea is not an albinism of D. azare, 
which is about all that can be said with certainty of its relationship. In 
referring above (p. 626) to Dasyprocta aurea I had in mind the form here 
described as 
Dasyprocta variegata urucuma subsp. nov. 
Type, No. 36918, @ ad., Urucum (near Curumba) Matto Grosso, Brazil, Dec. 7, 
1913; Leo E. Miller, Roosevelt Brazilian Expedition. 
Upperparts dusky, the hairs annulated narrowly near the base with white, and 
apically broadly with yellow, the dark basal portion of the hairs more or less visible 
at the surface, particularly along the midline of the back; hairs of the rump length- 
ened, deep black with conspicuous yellowish white tips; underparts like the flanks, 
with a narrow midline of pale yellowish white; inside of limbs yellow, outside dusky, 
the hairs tipped with yellow; upper surface of hind feet deep black, of fore feet 
blackish, the hairs minutely tipped with yellow; soles of fore feet brown, of hind 
feet intense black. 
Field measurements, total length, 570 mm.; tail, 20; hind foot, 120; ear, 30. 
Skull, total length, 102; condylobasal length, 93; zygomatic breadth, 48; inter- 
orbital breadth, 28.5; diastema, 26; maxillary toothrow, 17.6. 
Berncacied by ihe type only, an old female, with the basal sutures of the skull 
ankylosed and the teeth greatly worn. 
This form belongs to the D. variegata group, and hence requires no 
comparison with D. azare. On the other hand, it is obviously more nearly 
related to D. variegata yungarum Thomas, from Yungas, Bolivia, than to 
any other described form, from which it appears to differ in somewhat smaller 
size and less ochraceous coloration. 
