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spermophile article: the num-
ber containing it having probably
miscarried.

So by all means write the
article on the mice; it will be
very diserable. I am not now
prepared to give you the names
of the species, not having finished
with these families. but you are
probably right with the name
of the Arvicola oneida. If the
larger species one has a pure
grayish lead colored belly; this
is A. riparius; the other
has a decided rusty tinge to the more
whitish belly; the under part of
the tail is also quite white, con-
specuously whiter and more hairy
than in the other. This is the
Arvicola austerus of Leconts whether
the same with A. hirsutis I
know not. Of the long tailed
mice, all the wild species
of which belong to the genus Hes-
peromys. Refer to them as
you do in your letter, and I
can afterwards put in the cor-
rect entries. I am in no hurry
about the article; five or six
months hence if you cant give
it sooner, will do, although If