The families, genera, and species recorded in this report are arranged
following Hall and Kelson (1959). Subspecies are in alphabetical order
under the species. Remarks are given on natural history in each species
account, if information is available. Discussion of subspecies known
from the state is included. Under each subspecies, the citation to the
original description is given with mention of type locality. Next is
the citation to the first usage of the current name-combination. Then,
synonyms are listed if there be such in the sense that original
descriptions of the alleged species or subspecies had type localities
in Tamaulipas.
Measurements, unless otherwise noted, are of adults and are given in
millimeters. External measurements are in the following order: total
length; length of tail vertebrae; length of hind foot; length of ear
from notch. Capitalized color terms are those of Ridgway, Color
Standards and Color Nomenclature, Washington, D. C., 1912. Capital
letters designate teeth in the upper jaws and lower case letters
designate teeth in the lower jaws; for example, M2 refers to the second
upper molar and m2 refers to the second lower molar.
The localities of specimens examined and additional records are listed
from north to south and their geographic positions can be found in the
gazetteer and on the map (Fig. 4).
Most of the specimens examined are in the Museum of Natural History of
the University of Kansas. Unless otherwise indicated, catalogue numbers
relate to that collection. A few specimens from other collections were
seen. Abbreviations identifying those collections are: UMMZ, the
University of Michigan Museum of Zoology; AMNH, the American Museum of
Natural History; and GMS, George M. Sutton collection (University of
Oklahoma).
I am grateful to Prof. E. Raymond Hall and Dr. J. Knox Jones, Jr., for
their advice and kind help that have enabled me to complete this work.
I thank Dr. William E. Duellman for his advice concerning Zoogeography
and Biologist Gaston Guzman for help with the names of plants. For the
loan of specimens I am grateful to Dr. George M. Sutton of the
University of Oklahoma, to Dr. David H. Johnson and Dr. Richard H.
Manville of the United States National Museum, to Drs. William H. Burt
and Emmet T. Hooper of the University of Michigan Museum of Zoology,
and to Dr. Richard Van Gelder of the American Museum of Natural
History. I thank, also, Dr. William Z. Lidicker, Jr., for information
about the locality called Lulu, and the collectors from the Museum of
Natural History, especially Gerd H. Heinrich, William J. Schaldach,
Percy L. Clifton, and John H. Bodley. I am grateful also to Charles A.
Long and to several other persons, not named here, who helped me in
some way to complete my study of the mammals of Tamaulipas.
Most of the field work was financed by the Kansas University Endowment
Association. Some laboratory work was done when the author was
half-time Research Assistant under Grant No. 56 G 103 from the National
Science Foundation.