molar teeth, 6.3 (6.1), 6.3 (5.9).

_Specimens examined._--Two from the type locality.

Lepus californicus curti new subspecies

Black-tailed Jack Rabbit

_Type._--Female, adult, skull and skin, No. 35470, Mus. Nat. Hist.,
Univ. Kansas; from island, 88 miles south and 10 miles west of
Matamoros, Tamaulipas, Mexico; obtained 19 March 1950 by E.R. Hall;
original No. 6783.

_Range._--Islands along coast of Tamaulipas, Mexico.

_Diagnosis._--Color pale; size small; ears short; tympanic bullae small.

_Comparisons._--From _Lepus californicus merriami_ Mearns (specimens
from Fort Clark, Brownsville and intermediate localities), _L. c. curti_
differs in paler color, lesser size except ear that is of almost same
length and except interorbital breadth that is approximately same in the
two subspecies; tympanic bullae notably smaller. From _Lepus
californicus altamirae_ Nelson, _L. c. curti_ differs in having the
black patch on the nape less definitely divided by a median,
longitudinal band of buffy color, and lesser size. Exception is to be
made for the ear and tympanic bullae, which are of approximately the
same size in the two subspecies.

_Remarks._--The subspecific part of the name _Lepus californicus curti_
is proposed in honor of Dr. Curt von Wedel who shared the pleasure of
collecting on the islands where this handsome hare lives.

The specimens of _L. c. curti_ are all females, which, in the genus
_Lepus_, average larger than the males. Comparison of the measurements
recorded below with those in the account by Nelson (N. Amer. Fauna,
29:129, 1909) may not reveal the full measure of difference in size
between _L. c. curti_ and other subspecies because Nelson (_op. cit._)
pooled males and females in obtaining the average measurements that he
records. For example, he used three males and two females of _Lepus
altamirae_ in obtaining an average (_op. cit._:117). The specimens of
_L. c. curti_ here recorded are thought to be of full size inasmuch as
the degree of fusion of bones in the skull, and the density of the
cranial bones indicate full adulthood for each specimen.
Reproductive-wise, there is no question as to adulthood; each of the
four females was pregnant. One specimen had two embryos (each 30
millimeters long in crown-rump measurement) and each of the other
specimens contained one embryo. These three embryos were 55, 60, and 105
mm. long.

Three of our specimens, including the holotype, were obtained no