_Chilonycteris parnellii mexicana_ Miller.--One specimen (54934) from 10 mi. W, 2 mi. S Piedra, 1200 ft., Tamaulipas, taken by Gerd H. Heinrich, on June 13, 1953, extends the known range of this species 76 miles east-northeast (Goodwin, 1954:4), previously the most northern recorded occurrence in northeastern Mexico. Thirty other specimens have been taken from four additional localities between El Pachón and the place 10 mi. W, 2 mi. S Piedra. _Pteronotus davyi fulvus_ (Thomas).--Ten specimens (57525-57534) from Rancho Santa Rosa, 25 km. N, 13 km. W Cd. Victoria, 260 meters, Tamaulipas, taken by W. Schaldach, V. Grissino, and R. Grimsley, from December 26, 1953, to January 5, 1954, extend the known range of this species 360 miles northward from Mirador, Veracruz (Davis and Russell, 1952:235). Another specimen from Tamaulipas in our collection is from Rancho Pano Ayuctle, 8 mi. N Gómez Fárias, 300 feet. _Glossophaga soricina leachii_ (Gray).--Two specimens (54942-54943) from 16 mi. W, 3 mi. S Piedra, Tamaulipas, taken by Gerd H. Heinrich, on June 15, 1953, extend the known range of this species on the Gulf Coast of Mexico northward 60 miles from 5 mi. NE Antiguo Morelos, near El Pachón, Tamaulipas (de la Torre, 1954:114). _Anoura geoffroyi lasiopyga_ (Peters).--Three specimens (36574-36576) from 2 mi. SE Jalcocotán, 3000 ft., Nayarit, the first records for the state, taken by J. R. Alcorn, on February 15, 1950, extend the known range of the species 50 miles northward from San Sebástian, Jalisco (Sanborn, 1933:27). _Choeronycteris mexicana_ Tschudi.--Three specimens (60176-60178) from 4 km. N Joya Verde, near Huisachal, 4000 ft., Tamaulipas, taken by W. Schaldach, on July 17, 1954, extend the known range of this species eastward into the state of Tamaulipas. Eastern marginal records in northeastern Mexico were 1 mi. S and 4 mi. W Bella Unión, 7000 ft., Coahuila (Baker, 1956:174), and Hacienda Capulín, San Luis Potosí (Dalquest, 1953:27). _Centurio senex_ Gray.--One specimen (54958) from 14 mi. W, 3 mi. S Piedra, Tamaulipas, extends the known range of the species 58 miles northward from Pano Ayuctle, near Gómez Fárias, Tamaulipas (de la Torre, 1954:114). _Natalus mexicanus saturatus_ Dalquest and Hall.--Two specimens (54999-55000) from the Sierra de Tamaulipas, 14 mi. W, 3 mi. S Piedra, Tamaulipas, taken by Gerd H. Heinrich, on June 12, 1953, extend the known range of this species 61 miles northward from El Pachón, Tamaulipas (Goodwin, 1954:5). Forty-one other specimens have been taken from three localities between El Pachón and the new record station mentioned above.