Measurements.—An adult male (University of Kansas Museum of Natural History Catalogue Number, 17900), a subadult male (19273), and adult female (19272, the holotype) and a subadult female (19902), measure, in millimeters, respectively, as follows: Total length, —, 599, 578, 583; length of tail, —, 319, 335, 305; length of hind foot, 58, 62, 58, 60; basal length of skull, 56.1, 55.0, 52.8, 53.1; basilar length of Hensel, 53.6, 52.6, 50.3, 51.2; greatest zygomatic breadth, 41.6, 38.0, 39.0, 37.0; greatest mastoid breadth, 34.6, 34.3, 33.3, 31.5; breadth across postorbital processes, 22.2, 20.2, 20.5, 21.0; least interorbital breadth, 20.3, 18.2, 19.0, 18.5; palatal length, 24.2, 25.1, 24.2, 24.0; postpalatal length, 31.5, 29.6, 28.8, 29.0; foramen magnum to plane of last molars, 30.8, 29.4, 27.5, 29.0.
Specimens examined.—Total number, 5, all from Veracruz, Mexico, as follows: Rió Blanco, 20 km. WNW Piedras Negras, 3; 15 km. W Piedras Negras, 300 ft., 2.
University of Kansas Museum of Natural History, Lawrence, Kansas.
Transmitted October 31, 1949.