On new Foxes from Northern Argentina. 381 
ultimate segment has its entire hinder edge carinate, but is 
without the sharply limited short carina found in the other 
two species. 
The female is like that of the typical species, except that 
the elytra are rather more shining and have a well-marked 
callosity beyond the middle of the outer margin, the scutellum 
is a little longer, more pointed, and more punctured, and the 
pygidium is more even and very finely coriaceous, like the 
last ventral segment. 
The colouring is no doubt rather variable in this species, 
as in P, harringtont. Several specimens have been sent by 
the discoverer. 
XLV. — New Fowes of the Genera Cerdocyon and 
Pseudalopex from Northern Argentina. -By OLDFIELD 
‘THOMAS. 
(Published by permission of the Trustees of the British Museum.) 
In the course of his explorations Sr. Budin has sent home 
seven foxes from Northern Argentina, four being members 
of Cerdocyon and three of Pseudalopee. The former are 
referable to two definable forms—both new,—respectively 
from Tucuman and Jujuy, while of the latter two specimens 
are the comimon P. gracilis, Burm., while a little fox trom 
Chumbicha, Catamarca, seems again to represent a new 
species. 
The following cranial differences between Cerdocyon and 
Pseudalopex may be worth mentioning here :— 
If the lower jaw be put in position, the premolars, upper 
and lower, closely touch or overlap in Cerdocyon, but in 
Pseudalopex they remain always some distance apart. 
On laying the skulls on a flat surface, jaw in position, that 
of Cerdocyon stands with the tooth-row horizontal, and the 
back of the skull as well as the mandibular angle high off the 
supporting surface ; but that of Psewdalopex lies backwards, 
the tooth-row at a considerable angle with the horizon, the 
bullee and condyles nearly, and the mandibular angle quite, 
touching the support. 
