1912. Pteronotus davyi fulvus, Miller, Bull. U. S. Nat. Mus., 79:33, December 31.
Distribution in Tamaulipas.—Known only from the two localities reported in this paper.
According to field-notes of Schaldach et al., individuals of P. d. fulvus appear when it is almost dark (about 6:30 p. m. in December and January), ordinarily fly about 25 feet above the ground, but occasionally are seen at heights of between 60 and 70 feet (near tops of the largest cypress trees). Most bats flew in a straight line for 10 to 20 yards, then zig-zagged, and repeated the same movements. All specimens examined are in the brown color phase.
Records of occurrence.—Specimens examined, 11: Rancho Santa Rosa, 25 km. N, 13 km. W Cd. Victoria, 260 m., 10; Rancho Pano Ayuctle, 6 mi. N Gómez Farías, 300 ft., 1.
Choeronycteris mexicana Tschudi
Mexican Long-tongued Bat
1844. Choeronycteris mexicana Tschudi, Untersuchungen über die fauna Peruana ..., p. 72, type from México.
Distribution in Tamaulipas.—East side of Sierra Madre in southwestern part of state.
Specimens from La Mula were obtained in a small cave, which was inhabited also by Desmodus rotundus and Tadarida brasiliensis. The specimens from Miquihuana were captured in a mine by a native. Those from four kilometers north of Joya Verde also were taken from a mine. Females obtained in August at La Mula were lactating.
Specimens examined are indistinguishable from C. mexicana from Oaxaca and Jalisco. Baker (1956:172) found no differences between Coahuilan and Tamaulipan specimens. Most Tamaulipan specimens are dark grayish, but some are brownish and some are intermediate between the two colors mentioned. Fourteen adults weighed an average of 16.0 (12-18) grams.