BIRDS TURDIDAE SIALIA ARC TIC A. 
225 
separating the feathers. The quills are much edged with paler. The young birds have this 
brown streaked with white, except on the crown ; indeed, the under parts may be described 
sometimes as whitish, with narrow brownish edgings to the feathers on the under parts 
anteriorly. 
The bill of this species is much stouter than in mexicana, as well as longer than in sialis. 
The wings also are longer in proportion, reaching nearly to the end of the tail, which is more 
deeply forked than in either of the others. The male birds of the three species are readily dis- 
tinguishable ; the females are all much alike. The greener blue, the absence of rufous brown on 
either back or belly, and the longer wings, will serve to separate the latter. 
In the zoology of Stansbury's report 1 characterize a species under the name of Sialia macrop- 
tera on the ground of the unusually long wings, the weak claws, and the different shade of 
blue. This specimen (3706, Salt Lake, March 21, 1851) still remains quite unique in these 
respects. I am, however, now inclined to consider it as only a larger race, because more 
northern, of the S. arctica, strengthening the general proposition of the greater size of resident 
winter or summer specimens in northern than southern localities. The weak claws may have 
been an individual peculiarity. All the specimens before me, nearly thirty in number, agree, 
with scarcely an exception, in the smaller size and shorter wings. 
List of specimens. 
Catal. 
No. 
Sex and 
Locality. 
When col- 
lected. 
Whence obtained. 
Orig'l 
No. 
Collected by— 
Length. 
Stretch 
il'wing<. 
Wing. 
Remarks. 
J 875 
8888 
8883 
8884 
8889 
8886 
8887 
5640 
5636 
6990 
5639 
5638 
6691 
7080 
37C6 
7606 
8494 
7609 
7612 
7604 
7605 
7607 
7fiC8 
8 
9 
9 
Fort Union, Neb 
July 1, 1843 
Sept. 19, 
S.F.Baird 
Lt. G. K. Warren 
7.00 
7.50 
7.00 
7.25 
7.00 
7.00 
7.00 
7.50 
6.50 
13.75 
13.50 
13.50 
13.50 
13.25 
13.50 
13.25 
13.50 
13.25 
4.75 
4.25 
4.50 
4.50 
4.50 
4.50 
4.50 
4.50 
4.50 
Ills dark brown.. 
Sept. 21, 
Sept. 7, 
do 
8 
9 
8 
Iris dark brown.. 
do 
Sept. 18, 
Sept. 22, 
do 
8 
Sept. 20, 
Sept. 14, 
8 
$o 
'"q" 
8 
9 
9 
8 
Medicine Bow ereek,Neb 
Aug. 3,1856 
Aug. 9, 1856 
Lieut. F. T. Bryan.. 
196 
232 
216 
235 
335 
76 
July 20,1857 
Aug. 6,1856 
Aug. 9,1856 
Main Fork, Laramie R. . 
Medicine Bow creek 
Medicine Bow mountains 
July 27,1857 
July 26,1857 
Mar. 21,1851 
Lieut. Beckwith.. .. 
20 
20 
8 
Mar. 30,1856 
7.25 
10.00 
Near lat. 32° W. Texas. 
Mimbres to Rio Grande. 
8 
9 
75 miles west of Albu- 
querque. 
Nov. —,1853 
Mar. —,1853 
Lieut. Whipple .... 
Maj. Emory 
Lieut. Trowbridge 
15 
1 
29 b 
