_Sciurus negligens_ Nelson, Proc. Biol. Soc. Washington,
12:147, June 3, 1898. (Type from Alta Mira, Tamaulipas,
Mexico.)
_Specimens examined_, 17 as follows: 70 km. [by highway] S
of Ciudad Victoria and 6 km. W of the [Pan-American] highway
[at El Carrizo], 5; 70 km. [by highway] S Ciudad Victoria
and 2 km. W El Carrizo, 12.
_Remarks._--Referred to as "ardilla chica" locally, these squirrels
were most frequently seen in the dense forest of the lower, elevations.
Active both in trees and on the ground, these animals were reported as
being destructive to corn crops. Females taken in January were
lactating.
~Heterogeomys hispidus concavus~ Nelson and Goldman