an extinct species], type from [an
early Pleistocene or a late Pliocene deposit] "Rexroad formation,
Rexroad fauna. Locality UM-K1-47, Fox Canyon, XI Ranch, Meade County,
Kansas."

_Lasiurus cinereus cinereus_ (Palisot de Beauvois), 1796, type from
Philadelphia, Pennsylvania. Known from Late Pleistocene time as well as
from Recent time (see Hibbard and Taylor, Contributions Mus. Paleo.,
Univ. Michigan, 16:159, fig. 10A, July 1, 1960, for occurrence in
Cragin Quarry local fauna, Sangamon Age, Meade County, Kansas).

_Vespertilio pruinosus_ Say, 1823, type from Engineer Cantonment,
Washington Co., Nebraska.

_A[talapha]. mexicana_ Saussure, 1861, type from an unknown
locality, probably from Veracruz, Puebla, or Oaxaca.

_Lasiurus cinereus villosissimus_ E. Geoffroy St.-Hilaire, 1806, type
locality, Asuncion, Paraguay.

_Lasiurus grayi_ Tomes, 1857, type from Chile.

_Atalapha pallescens_ Peters, 1871, type from Paramo de la Culata,
Andes de Merida, Venezuela.

_Atalapha cinerea brasiliensis_ Pira, 1905, type from Ignape, Sao
Paulo, Brazil.

_Lasiurus cinereus semotus_ (H. Allen), 1890, type from Hawaii.

EXPLANATION AND ACKNOWLEDGMENTS

Hall and Jones are jointly responsible for the accounts of the two
species of yellow bats, but Hall alone assumes responsibility for the
other parts of the paper. Thanks are extended to the National Science
Foundation for financial support (Grant No. 56 G 103) of the study here
reported on. We are grateful also to the following persons for the loan
of specimens in their care: S. B. Benson, Museum of Vertebrate Zoology,
University of California (MVZ); W. F. Blair, Department of Zoology,
University of Texas (Univ. Texas); W. B. Davis, Dept. Wildlife
Management, Agricultural and Mechanical College of Texas (TAMC or Texas
A & M); D. H. Johnson, C. O. Handley, Jr., and W. H. Setzer, U.S.
National Museum (USNM); Barbara Lawrence, Museum of Comparative Zoology
at Harvard College (MCZ); J. N. Layne, Department of Biology,
University of Florida (UF); G. H. Lowery, Jr., Museum of Natural
History, Louisiana State University (LSU); P. J. H. van Bree,
Department of Mammals, Zoologisch Museum, Amsterdam (AZM); and R. G.
Van Gelder, American Museum of Natural History (AMNH). Thanks are
extended also to E. T. Hooper and W. H. Burt, Mus. Zoology, University
of Michigan (Univ. Mich.), to Philip Hershkovitz, Chicago Natural
History Museum (Chicago Mus.