_Records of occurrence._--Specimens examined, 28: all from 6.5 mi. N, 13 mi. W Jimenez, 1250 ft. =Sturnira lilium parvidens= Goldman Yellow-shouldered Bat 1917. _Sturnira lilium parvidens_ Goldman, Proc. Biol. Soc. Washington, 30:116, May 23, type from Papayo, about 25 mi. NW Acapulco, Guerrero. _Distribution in Tamaulipas._--Known presently only from Rancho Pano Ayuctle. The two specimens from Tamaulipas were reported by de la Torre (1954:114) and in eastern México are the northernmost yet reported of the genus. =Artibeus jamaicensis jamaicensis= Leach Jamaican Fruit-eating Bat 1821. _Artibeus Jamaicensis_ Leach, Trans. Linn. Soc. London, 13:75, type from Jamaica. _Distribution in Tamaulipas._--Tropical region of southern part of state. The specimens from northwest of El Encino were shot deep (250 yards) in a cave; specimens of _Myotis nigricans_ were obtained in the same cave. A female taken on May 24 carried a single embryo that was 43 mm. in crown-rump length. Six March-taken females reported by de la Torre (1954:114) had one embryo each that varied from 20 to 38 mm. in length. _Artibeus jamaicensis_ and _A. lituratus_ are the largest bats known from Tamaulipas. In addition to the differences between the two species pointed out by Lukens and Davis (1957:9), I note, in Tamaulipas at least, that the postorbital constriction is narrower in relation to the condylobasal length in _lituratus_, 24.6 (23.7-26.0) per cent as compared to 27.9 (26.7-29.9) per cent in _jamaicensis_. _Records of occurrence._--Specimens examined, 19: 10 km. N, 8 km. W El Encino, 400 ft., 10; Aserradero del Paraiso, 19 km. N Chamal (by road), 8 (AMNH); Cueva El Pachón, 5 mi. N Antiguo Morelos, 1 (AMNH). Additional records: Rancho Pano Ayuctle (de la Torre, 1954:114); 4 mi. N Antiguo Morelos, near El Pachón (_ibid._). =Artibeus lituratus palmarum= J. A. Allen and Chapman Big Fruit-eating Bat 1897. _Artibeus palmarum_ J. A. Allen and Chapman, Bull. Amer. Mus. Nat. Hist., 9:16, February 26, type from Botanical Gardens at Port of Spain, Trinidad. 1949. _A[rtibeus]. l[ituratus]. palmarum_, Hershkovitz, Proc. U. S. Nat. Mus., 99:447, May 10. _Distribution in Tamaulipas._--Tropical region in southern part of state. Two specimens from the Río Sabinas were taken in a mist net placed across the small, crevicelike entrance to a cave. Ten pregnant females taken in late May each contained a single embryo; average crown-rump length of the 10 embryos was 43 (35-55) mm. Tamaulipan specimens of _lituratus_ do not differ appreciably in color from topotypes except that the facial stripes are narrow and, in three individuals, poorly marked. Lukens and Davis (1957:9) reported that females from Guerrero were paler than the males, but the male examined in this study does not differ in color from the females seen.