Miscellaneous. 453 
ish white with an almost imperceptible tinge of yellowish under the 
wings. 
Length 54; wing 213; tail 33, inches. 
A single specimen of this bird was procured on the 26th of July 
on the Yellow Stone River, about thirty miles above its junction with 
the Missouri. It is evidently a bird of the season, with immature 
plumage, to which may be attributed the dullness of the black on the 
head and throat. On comparison of this bird with P. carolinensis 
and P. atricapillus, it will be perceived that, beginning with the 
smallest bird, the parts which are black decrease, and the white 
parts increase in size and intensity in ascending. In septentrionalis 
the outer web of the lateral tail-feather is entirely white, except a 
small portion near the base, where there is a slight tinge of gray next 
the shaft, and the quills, secondaries and all the tail-feathers are 
margined more broadly and with a purer white than in the other 
species. 
I have given a table showing the comparative measurements of the 
three American species of this division of the genus Parus having 
black heads, which so closely resemble each other in voice, habits 
and markings ; and have also added some measurements from a paper 
in the Archives of the Academy by M. de Selys-Longchamps, Cor- 
responding Member of the Royal Academy of Brussels, extracted 
from their ‘ Bulletin,’ vol. x.no.7. I have reduced his measurements 
to English inches and decimals, and have given my own also in de- 
cimals for more ready comparison. It will be seen that his speci- 
men from Iceland (frigoris) corresponds so nearly with our atrica- 
pillus as to render it probable that it is identical, while his atricapillus 
from Brisson is so near to Audubon’s carolinensis as to render it al- 
most certain that the description of P. atricapillus by the old authors 
was from our small southern bird. If this opinion be correct, our 
carolinensis should resume the name of atricapillus, and the larger 
bird be called frigoris, as suggested by M. de Selys-Longchamps. 
The note of this bird is similar to atricapillus, but its voice more 
liquid, and less harsh and querulous in the utterance. Bill longer 
and stouter. 
Length. Wing. Tail. Length. Wing. Tail. 
Parus Carolinensis ......+++.- one 42 22 22 or 4250 2°500 = 2°375 
BICONE civic cesesss sense 53 242 424% 5125 2°687 2°562 
septentrionalis (Nob.) ... 52 238 3, 5°875 2-812 3-093 
atricapillus(Briss.) | from the paper of M. f 4°794 2°397 
— frigoris ..........6 de Selys-Longchamps, | 5:149 2°663 
It will be seen by the above table, that while in each of the old 
American species the wing is +125, or 4th of an inch longer than the 
tail, in the new bird the ¢ai/ is *281, or nearly ;%,ths of an inch longer 
than the wing ; compared with atricapillus, the total length is greater 
by $ths of an inch, the wing by jth, and tail by $$ or more than 
half an inch. 
The colours in this immature specimen are only to be depended 
upon as showing the much greater development of the white and 
smaller extent of the black markings than in the other species, For 
the sake of more easy reference, the description has been made par- 
