310 U. Ss. P. BR. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
color extending a short distance around towards the nape. Rump 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 Hirwndo 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. 
| | | 
Catal. Sex and Locality. When col- Whence obtained. —_| Original) Collected by— Length.| Stretch | Wing. 
No. age. lected. of wings.| 
| 
Aug. 31, 1841 12.50))|, Kecee 
«| May 26, 1845 12.50 4.50 
| 
May 17...... 12.25 4.42 
May 11, 1846 12.25 4.50 
May 22, 1844 
Aug. 21, 1842 see 
|[Sulys ON 844i |e coer dosecuasiessensecec| ines ace 
May 11, 1846 
6487) eadss0 5s Philadelphia weccrere=esesescese|enss ae tafeseass 
agetsrers'ata Illinois ...-eeeeee R. Kennicott. 
4776 | @ | Bijoux Hill, N. T. | Lieut G. K. Warren .. 
ATTT | ooe coeeleccceecs TO vecclnceccceseccecscese| viseciel 0 cececc! ctetmsine 
477) (8) 7 | barcicons A\goqn0oboces coco ocndan eons oC Woctocal raando do 
4779 Gir i |easeeese dOscsieces ..do 
4780 OPN ecepese dOcecrincce 
55GB jess ceee Pole creek, Neb.. 4 Lieut. Bryan. ...ecseeee 
GGCHy I) WP escdance dOtcesas caadersecseesees HdOscoeu| peaewe dos scicsscuelseeoes| 
7079 ° W. Fork, Laramie river.......-. July 22,1857) Dr. W. A. Hammond...) 
4394 G | Fort Dalles, O. T..0. sesseeeees | May —, 1855] Dr. Suckley,U.3. A....| 
6021 fot Benicia, Cal. ceceseesseeeccwees|secceecscoes -| Lieut, Williamson....../seee sees | Dr. Heermant.. ees see.) seen eeee| sees eeee GSOSROSD 
6022 Gi oncecces do. " 60] boocanodeenuon jeouodd COjsctewiesicsccaslooest ernisince [esteria'e ( Wocognesaadcococe nocaoazal loos Gioeistl| |tesclestes 
6023) | eee eeee San Francisco..... Meier osetia ire | May 8, 1855:| Lieut. Trowbridge’ .....|.s.cccee|scasinvcvesacicsevccce tee: cous voce ecubidend loco“agas 
HIRUNDO BICOLOR, Vieillot. 
White-bellied Swallow. 
Hirundo bicolor, Vieiui0T, Ois. Am. Sept. I, 1807, 61; pl. xxxi-—Avupvugon, Orn. Biog. 1831, 491; pl. 98.—Is. Syn. 
1839, 35.—Is. Birds Amer. I, 1840, 175; pl. 46.—Cassin, Illust. I, 1855, 244.—Brewer, N. Am. 
Oology, I, 1857, 100; pl. iv, fig. 47. (Egg.) 
Tachycineta bicolor, CaBANIs, Mus. Hein. 1850-51, 48. 
Herse bicolor, Bonar. Conspectus, 1850, 341. 
Hirundo viridis, Witson, Am. Orn. V, 1812, 49; pl. xxxviii. 
Hirundo leucogaster, STEPHENS, Shaw, Zool. X, 1817, 105. 
Sp. Cu.—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. 
Hab —North America from Atlantic to Pacific. 
