1918 | Grinnell: A Synopsis of the Bats of California 283 
various small bats known to oceur within the state of California. He 
does not, however, indicate to which of the races of californicus the 
name may be taken to apply. According to H. Allen (1894, p. 94), 
the type is lost. I have here applied the name californicus to the 
race occupying that portion of California north of about latitude 
36 degrees and west of the desert divides. H. Allen (1862, pp. 
247-248) describes five specimens of californicus under the new name 
Vespertilio nitidus, concluding that the description given by Audubon 
and Bachman is not sufficiently clear to identify the animal. Since 
the specimen first mentioned by Allen came from Monterey, Califor- 
nia, Miller (1897), p. 69) lists nitidus as a synonym of californicus. 
Lyon and Osgood (1909, p. 272), however, consider, for reasons which 
they state, that the type should be regarded as having come from 
Fort Steilacoom, Washington (where four of the five specimens were 
secured). In the latter case it would apply to the race of californicus 
now known as Myotis californicus cawrinus Miller. I have accepted 
Miller’s ruling, whereby ‘nitidus becomes a synonym of californicus. 
I have examined the five specimens from Mount Sanhedrin which 
were referred to the race caurinus by Rehn (in Stone, 1904a, p. 579) 
and find them to belong rather to M. c. californicus, as here under- 
stood. 
Remarks.—In a series of fifty skins of the races califormecus and 
quercinus there is a lack of the uniformity of coloration which so 
clearly marks the race pallidus, and yet the distinctness of the two 
first-mentioned races cannot be questioned when the mass coloration 
is considered. A series of seventeen skins of Myotis californicus cali- 
fornicus, including both adults and young, taken during July at the 
one locality, Fyffe, Eldorado County, shows extremes, the paler of 
which is indeed lighter colored than the darkest quercinus; but the 
mean places the entire series with californicus, the latter as repre- 
sented by a series from west-central California. Stephens (1906, 
pp. 266-267), a field naturalist of long experience in California, 
considers bats of the Myotis californicus group migratory and states 
that ‘‘a few Bats winter in the Colorado Desert; these appear to be 
intermediate between pallidus and californicus.’’ This statement by 
Stephens calls to mind certain lines from the paper by Murphy and 
Nichols (1918, p. 6) on Long Island bats: 
... We may attribute to the Silver-haired Bat and other bats, a type of migra- 
tion analogous to that of many birds, in which the individuals of a species within 
a given breeding range move southward in fall, only to be replaced by winter 
