Incidental to studies of speciation of North American mammals,made possible by assistance from the National Science Foundationand the Kansas University Endowment Association, a number ofbats have been taken beyond the limits of their previously knowngeographic ranges. Pending the completion of more detailedfaunal accounts, these notes are published so that the distributionalrecords will be available to interested students of Mexican mammals.
Many of these bats are essentially tropical and the new recordshere reported, extend the known geographic ranges to the northwardon either the east or the west coast of Mexico. Continuedcollecting, especially by the intensive application of a variety ofmethods including the use of mist nets, in the northern parts of thezone of tropical vegetation can be expected to yield other species oftropical bats beyond the limits of the ranges now known. Cataloguenumbers cited in parentheses are those of the Museum of NaturalHistory.
Chilonycteris psilotis Dobson.—Six specimens (36426-36431)taken 7 mi. W and ½ mi. S Santiago, at sea level, Colima, by J. R.Alcorn, on March 17, 1950, extend the known range of this species330 miles westward from the most northwestern recorded occurrenceat Alpuyeca, Morelos (Davis and Russell, 1952:234). Use ofthe name psilotis is explained by de la Torre (1955:697).
Chilonycteris parnellii mexicana Miller.—One specimen (54934)from 10 mi. W, 2 mi. S Piedra, 1200 ft., Tamaulipas, taken by GerdH. Heinrich, on June 13, 1953, extends the known range of this species76 miles east-northeast (Goodwin, 1954:4), previously the mostnorthern recorded occurrence in northeastern Mexico. Thirty otherspecimens have been taken from four additional localities betweenEl 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, andR. Grimsley, from December 26, 1953, to January 5, 1954, extendthe known range of this species 360 miles northward from Mirador,Veracruz (Davis and Russell, 1952:235). Another specimen from[Pg 350]Tamaulipas in our collection is from Rancho Pano Ayuctle, 8 mi. NGómez Fárias, 300 feet.
Glossophaga soricina leachii (Gray).—Two specimens (54942-54943)from 16 mi. W, 3 mi. S Piedra, Tamaulipas, taken by GerdH. Heinrich, on June 15, 1953, extend the known range of this specieson the Gulf Coast of Mexico northward 60 miles from 5 mi. NEAntiguo Morelos, near El Pachón, Tamaulipas (de la Torre, 1954:114).
Anoura geoffroyi lasiopyga (Peters).—Three specimens (36574-36576)from 2 mi. SE J