ens examined from Louisiana resemble _floridanus_ from Georgia
and Florida to the eastward in external dimensions. Some of those
specimens resemble _floridanus_ in size of skull, but two skulls from
Louisiana are inseparable from those of topotypes of _intermedius_. The
upper parts of specimens from Louisiana are generally like those of
animals to the east but average somewhat paler (less brownish). The
specimens seen from Louisiana seem to be intergrades between
_intermedius_ and _floridanus_ but clearly are assignable to the
latter.

[Illustration: FIG. 1. Condylocanine length plotted against length of
forearm for specimens of the species _Lasiurus intermedius_.]

The picture is less clear as regards bats from southeastern Texas (one
specimen each from Colorado and Travis counties, and four specimens
from Harris County). Five of the specimens have skulls (the Travis
County specimen is a skin only) and of these, four are clearly
assignable, on the basis of size and shape of the skull, to
_intermedius_. The fifth skull (specimen from Colorado County) is
intermediate in size between _floridanus_ and _intermedius_ and on
that basis alone could be assigned with equal propriety to either. All
these specimens from Texas more closely resemble _floridanus_ than
_intermedius_ in external size (forearms: 49.2, 49.6, 50.7, 49.9
(approximate), 49.6, 49.1). The pale yellowish-gray upper parts of the
four adults, seemingly resulting from a dilution of the brownish color
found in _floridanus_, differ from the color of typical specimens of
both _intermedius_ and _floridanus_, but the average is nearer that of
_floridanus_ than that of _intermedius_. Color of pre-adult pelage in
the one July-taken young of the year resembles the color of adults. An
August-taken young of the year is in process of acquiring the adult
pelage but the hairs have not reached their full growth; it is pale
yellowish but not so grayish as the other specimens. All characters
considered, the specimens from eastern Texas resemble _floridanus_
more than they do _intermedius_, and so are provisionally assigned to
_floridanus_ (as was done by Taylor and Davis, 1947:19; Eads, _et
al._, 1956:440; and, Davis, 1960:59). Additional material from
southeastern Texas is needed. It will be remembered that the type
locality of _intermedius_ is in the Rio Grande Valley; all specimens
seen, in the study here reported on, from the Texas side of the valley
are unquestionably ref