EXTENSIONS OF KNOWN RANGES OF MEXICAN BATS
Incidental to studies of speciation
of North American mammals, made possible by assistance
from the National Science Foundation and the Kansas
University Endowment Association, a number of bats
have been taken beyond the limits of their previously
known geographic ranges. Pending the completion
of more detailed faunal accounts, these notes are
published so that the distributional records will be
available to interested students of Mexican mammals.
Many of these bats are essentially
tropical and the new records here reported, extend
the known geographic ranges to the northward on either
the east or the west coast of Mexico.Continued
collecting, especially by the intensive application
of a variety of methods including the use of mist
nets, in the northern parts of the zone of tropical
vegetation can be expected to yield other species of
tropical bats beyond the limits of the ranges now
known.Catalogue numbers cited in parentheses
are those of the Museum of Natural History.
Chilonycteris psilotis Dobson. Six
specimens (36426-36431) taken 7 mi.W and
1/2 mi.S Santiago, at sea level, Colima,
by J. R. Alcorn, on March 17, 1950, extend the known
range of this species 330 miles westward from the
most northwestern recorded occurrence at Alpuyeca,
Morelos (Davis and Russell, 1952:234).Use of
the 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 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 Pachon 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 Gomez Farias, 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 Pachon, Tamaulipas
(de la Torre, 1954:114).
Anoura geoffroyi lasiopyga
(Peters). Three specimens (36574-36576)
from 2 mi.Se Jalcocotan, 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 Sebastian,
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 Union,
7000 ft., Coahuila (Baker, 1956:174), and Hacienda
Capulin, San Luis Potosi (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
Gomez Farias, 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 Pachon,
Tamaulipas (Goodwin, 1954:5).Forty-one other
specimens have been taken from three localities between
El Pachon and the new record station mentioned
Rhogeessa parvula tumida H.
Allen. One specimen (55192) from 4 mi.N La Pesca, Tamaulipas, taken by Gerd
H. Heinrich, on May 24, 1953, extends the known range
of the species on the east coast of Mexico northward
115 miles from 10 kms.WSW Ebano, Veracruz
(Dalquest, 1953:58), and also northeastward 115 miles
from Santa Maria, Tamaulipas (Goodwin, 1954:6).Another new marginal locality for this species, represented
by 39 specimens in our collection, is 10 mi.W, 2 mi.S Piedra, 1200 ft., Tamaulipas.
Baeodon alleni (Thomas). A
specimen (68773) from 6 mi.W and 2 mi.N Nejapa, Oaxaca, taken by A. A. Alcorn, on August
6, 1955, extends the known range of this species southeastward
100 miles from Cuicatlan, 590 meters, Oaxaca (Hall,
1955:2).Until recently this species was known
from the type locality only.
Lasiurus borealis ornatus Hall. Sixteen
specimens (55325-55340) from near Piedra, 1200 to
1400 ft., Tamaulipas (1 from 10 mi.W, 2
mi.S; 1 from 14 mi.W, 3 mi.S; and 14 from 16 mi.W, 3 mi.S Piedra) tend to fill a gap in the known distribution
of this species.Previously it was known from
Matamoros, Tamaulipas (Miller, 1897:108), to the north
and from Bledos, San Luis Potosi (Dalquest, 1953:61),
to the south.Assignment to the subspecies L.
b. ornatus is tentative and is based primarily
on the scanty cover of hair toward the margin of the
interfemoral membrane and scanty cover of hair on the
ventral surface of the membrane along the forearm.Adequate comparative material of L. b. ornatus
from southern Mexico is not available.