222 
U. S. P. R R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
SIALIA SIALIS, Baircl. 
Blue Red-Breasted Blue Bird. 
JMotacilla sialis, Linnaeus, Syst. Nat. ed. X, I, 1758, 187.— Gmelin, Syst. Nat. I, 1788, 989. 
Sylvia sialis, Latham, Index Orn. II, 1790, 522.— Vieillot, Ois. Am. Sept. II, 1807, 40 ; pi. ci, cii, ciii, (8 Q O .)— 
Wilson, Am. Orn. I, 1808, 56 ; pi. iii.— Doughty, Cab. N. H. I, 1830, 135 ; pi. 
xii.— Audubon, Orn. Biog. II, 1834, 84 : V, 1839, 452 ; pi. 113. 
Saxicola sialis, Bonap. Sjmopsis, 1828. 
Jhnpelis sialis, Nuttall, Man. I, 1832, 444. 
Rubecula carolinensis camilca, Brisson, Orn. 111,1760,423. (Speaks of blue spots on throat.)— Buffon, Ois. VI, 
107 ; pi. enl. 396, f. 1, 2. 
Siulia icilsonii, Swainson, Zool. Jour. Ill, 1827, 173.— Bonaparte, List, 1838.— Audubon, Synopsis, 1839, 84.— Ib. 
Birds Amer. II, 1841, 171 ; pi. 134. 
Erythraca ( Siulia ) wilsonii, Sw. & Rich. F. Bor. Am. II, 1831, 210. 
Sp. Ch. —Entire upper parts, including wings and tail, continuous and uniform azure blue ; the cheeks of a duller tint of the 
same. Beneath reddish brown ; the abdomen, anal region, and under tail coverts white. Bill and feet black. Shafts of the 
quills and tail feathers black. Female with the blue lighter, and tinged with brown on the head and back. Length, 6.75 ; 
wing, 4.00 ; tail, 2.90. 
Hab.— Eastern North America to a little west of Missouri river Fort Laramie. 
The female is quite similar to the male, only duller above ; the blue tinged with brown, 
although the wings, tail, and rump are generally light blue. The young male of the year has 
the head and interscapular region, with the lesser coverts dull brown, streaked (except the 
head) with white. The throat and fore breast are reddish brown, the feathers streaked with 
white ; the remaining colors are much as in the adult male, except that the tertials are edged 
with brown. 
There is much difference in the size and shape of the hill in specimens from the same locality. 
List of specimens. 
Catal. 
No. 
Sex and 
age. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Orig’l 
No. 
Collected by— 
Length. 
Extent. 
Wing. 
Remarks. 
739 
1285 
1309 
1289 
' 1283 
7409 
7408 
3819 
3865 
4920 
7616 
8391 
5636 
6560 
4723 
5288 
5290 
5289 
4722 
4658 
8884 
8880 
8882 
7615 
8 o 
8 
8 
8 
9 
8 
9 
Sept. 21,1842 
Mar. 9,1844 
Mar. 25,1844 
Mar. 11,1844 
Mar. 7,1844 
Ap:il 19,1851 
April 1,1851 
Jan. —,1853 
S. F. Baird. 
6.25 
6.83 
6.66 
6.75 
6.50 
12.16 
12. 
12.50 
12.50 
12. 
3.91 
3.83 
4.08 
4.08 
3.75 
10 
Jan. 20,1855 
Jan. 22,1857 
June 17,1856 
8 
8 
Independence, Mo. 
East of Fort Riley, IC. T.. 
W. M. Magraw. 
98 
22 
Dr. Cooper. 
W. s. Wood. 
6.75 
12.25 
4.25 
Dr. W.A.Hammond 
Lt. Warren. 
8 
8 
8 
Bald island, Neb. 
April 24,1856 
May 31,1856 
Dr. Hayden. 
6.62 
6.75 
6.12 
6.75 
6.37 
7.50 
6.75 
6. 
6.12 
11.50 
11.50 
11.50 
11.87 
11.75 
12.50 
11. 
11. 
12.12 
3.75 
4. 
4.12 
4.25 
4. 
4.50 
3.75 
4. 
4.25 
Near mouth of Powder riv. 
Aug. 1,1856 
May 16,1856 
May 11,1855 
8 
8 
8 
8 
8 
5 miles above mo. of Platte. 
fris brown. 
July 8,1855 
July 3,1855 
Near Loup Fork, Platte... 
. 
Capt. Pope. 
' 1 
