310 
U. S. P. E, R. EXP. AND SURVEYS — - ZOOLOGY GENERAL REPORT. 
color extending a short distance around towards the nape. Eump light chestnut. Forehead 
and middle of belly brownish or dull yellow brownish white ; the upper part of the breast and 
the sides of the body light grayish brown. A large spot on the throat crossing the line of 
separation between the chestnut and brown, steel blue ; this sometimes seen in the chin. 
The lores and a very narrow line along the base of the bill are black. The feathers on the 
middle of the back exhibit whitish edges, more or less conspicuously. Wings and tail brown, the 
secondaries with lighter margins. 
The female is not appreciably different in color. 
The young lacks the frontal band, and the gray collar on the nape is only faintly indicated. 
There is usually a good deal of white on the throat, on the lower part of which the black spot 
is more extended and less distinct than in the adult. 
Specimens vary in the extent of chestnut on the rump, in the width and precise shade of the 
frontal patch, &c. 
This species differs from the true Hirundo fulva, Vieillot Encyclop. 527, of the West Indies, 
in the larger size, lighter colored rump, and in the presence of a black spot on the throat. 
List of specimens. 
Sex and 
Locality. 
When col- 
lected. 
Whence obtained. 
Original 
No. 
Collected by- 
Length 
Stretch 
"I wings 
Wing. 
Aug. 31, 1841 
May 26, 1845 
S. F. Baird 
5.75 
5.92 
5.67 
5.67 
5.83 
12.50 
12.50 
12.25 
12.25 
12.08 
3 
9 
<J 
3 
Q 
9 
Q 
4.50 
4.42 
4.50 
4.92 
May 11, 1846 
May 22, 1844 
Aug. 21, 1842 
July 9, 1844 
May 11, 1846 
5.92 
5.75 
12.92 
12.33 
4.33 
4.33 
3 
Bijoux Hill, N. T 
May 20, 1856 
5.87 
12.25 
4.50 
Q 
3 
9 
do 
5.50 
5.75 
5.75 
5.50 
5.50 
12.25 
12.25 
12.25 
4.50 
4.50 
4.50 
4.75 
4.50 
do 
July 26, 1856 
159 
158 
3 
o 
3 
3 
3 
July 22, 1857 
May — , 1855 
Dr. W. A. Hammond. . . 
Dr. Sucklcy,U.S. A.... 
58 
178 
5.62 
4.37 
May 8, 1855 
2358 
2284 
2617 
1565 
685 
1623 
2616 
6487 
4776 
4777 
4778 
4779 
4780 
5598 
5599 
7079 
4394 
6021 
HIRUNDO BICOLOR, Vieillot. 
Wliite-bellied Swallow. 
Hirundo bicolor, Vielliot, Ois. Am. Sept. I, 1807, 61; pi. xxxi— Audubon, Orn. Biog. 1831,491; pi. 98.— Ib. Syn. 
1839, 35.— Ib. Birds Amer. I, 1840, 175 ; pi. 46.— Cassin, Ulust. I, 1855, 244.— Brewer, N. Am. 
Oology, I, 1857, 100 ; pi. iv, fig. 47. (Egg.) 
Tachycineta bicolor, Cabanis, Mus. Hein. 1850- '51, 48. 
Herse bicolor, Bonap. Conspectus, 1850, 341. 
Hirundo viridis, Wilson, Am. Orn. V, 1812, 49 ; pi. xxxviii. 
Hirundo UucogasUr, Stephens, Shaw, Zool. X, 1817, 105. 
g p Ch. Glossy metallic green above ; entirely white beneath. Female much duller in color. Wing 5 inches. 
Length, 6.25 inches; wing, 5.00 ; tail, 2.65. 
Hob —North America from Atlantic to Pacific. 
