1858. _Perognathus hispidus_ Baird, Mammals, in Repts. Expl.
Surv. ..., 8(1):421, July 14, type from Charco Escondido,
Tamaulipas.
_Distribution in Tamaulipas._--Central and northern parts of
state.
Two specimens examined from the vicinity of Nuevo Laredo were trapped
in weeds and tall grass along an irrigation ditch that ran between
desert and a cornfield. One was a lactating female (November 15) and
weighed 31 grams; the other, an immature male, weighed 23 grams. A
May-taken specimen from Soto la Marina possesses a broader and more
ochraceous lateral line than the other three individuals examined from
Tamaulipas and the Texan specimens seen.
_Records of occurrence._--Specimens examined, 4: 10 mi. S,
11 mi. E Nuevo Laredo, 600 ft., 2; Soto la Marina, 500 ft.,
1; 9-1/2 mi. SW Padilla, 800 ft., 1.
Additional records (Osgood, 1900:44, unless otherwise
noted): Mier; Matamoros; Charco Escondido (Baird, 1858:422);
3 mi. W Soto la Marina (Hooper, 1953:5).
=Perognathus nelsoni nelsoni= Merriam