BIRDS-SYJj’VICOLIDAE-GEOTHLYPIS TRICIIAS. 
24 L 
B.—Tail rounded. Head all round ash ; the leathers of the chin and throat black with ashy 
margins. 
A black patch on the fore part of breast; lores dusky ; no white about the 
eye. G. Philadelphia. 
Fore part of breast like throat; forehead and lores black ; eyelids with a white 
patch. G. macgillivrayi. 
Comparative measurements of species. 
Catal. 
No. 
Species. 
Locality. 
Sex. 
Length. 
Stretch 
of wings. 
Wing. 
Tail. 
Tarsus. 
Middle 
toe. 
. 
its claw 
alone. 
Bill 
above. 
Along Specimen 
gape, measured. 
2535 
4.60 
2.30 
2.30 
0.76 
0.70 
0.20 
0.44 
0.60 Dry. 
0 
5 50 
7.41 
2.41 
2363 
Q 
4 50 
2.10 
2.10 
0.78 
0.68 
0.19 
0.46 
0.54 Dry. 
5 08 
0.83 
2.16 
7922 
5 22 
2.30 
2.38 
0.78 
0.68 
0.20 
0.40 
0.56 Dry. 
7918 
$ 
5.00 
2.16 
2.30 
0.78 
0.68 
0.16 
0.44 
0.52 Dry. 
5.37 
6.75 
7920 
4 96 
2.20 
2.24 
0.80 
0.67 
0.18 
0.48 
10107 
o 
ff 
4 36 
2.00 
2.24 
0.70 
0.60 
0.16 
0.42 
0.54 Dry. 
689 
o 
4.86 
2.38 
2.20 
0.86 
0.70 
0.18 
0.42 
0.56 Dry. 
1697 
o 
4.80 
2.42 
2.28 
0.84 
0.70 
0.18 
0.42 
do. 
<s 
5.75 
8.00 
2.50 
1037 
D 
4.56 
2.30 
2.14 
0.82 
0.66 
0.20 
0.41 
0.54 Drv. 
V 
5.33 
9.6G 
2.17 
1861 
Geothlypis macgillivrayi 
Columbia river. 
5 
5.04 
2.38 
2.32 
0.78 
0.66 
. 
0.18 
0.42 
0.56 Dry. 
GEOTHLYPIS TRICHAS, Cabanis. 
Maryland Yellow-throat. 
Turdus trichas, Linn. Syst. Nat. I, 17G6, 293.— Gmelin, Syst. Nat. I, 1788. 
Sylvia trichas, Latham, Ind. Orn. If, 1790.— Vif.ili.ot, Ois. Am. Sept. II, 1807, 28 ; pi. xxviii & xxix.— Aud. Orn. 
Biog. I, 1832, 120 : Y, 1838, 4G3, pi. 23 & 240. 
Ficedula trichas, Brisson, Orn. 
Geothlypis trichas, Cabanis, Mus. Hein. 1850, 1G. 
Ficedula marilandica, Brisson, Orn. Ill, 1760, 506. 
Sylvia marilandica, Wilson, Am. Orn. I, 1808, 88 ; pi. vi, 6 1. 
Trichas marilandica, Bon. List, 1838.— Ib. Consp. 1850, 310.— Aud. Syn. 1839, 65.— Ib. Orn. Biog. II, 1841, 78; pi. 102. 
Regulus mystaceus, Stephens, Shaw, Zool. Birds, XIII, n, 182G, 232. 
Trichas personatus, Swainson, Zool. Jour. Ill, 1827, 1G7. 
Sylvia roscoe, Aud. Orn. Biog. I, 1832, 124 ; pi. 24. (Young male.) 
Trichas roscoe, Nuttall, Man. I, 2d ed. 1840, 457. 
Trichas brachydactyla, Swainson, Anim. in Menag. 1838, 295. 
Buffon, PI. enl. 709, f. 2. 
Sp. Ch. —Upper parts olive green, tinged with brown towards the middle of the crown ; chin, throat, and breast as far as the 
middle of the body, with the under tail coverts blight yellow. Belly dull whitish buff. Sides of body strongly tinged with 
light olive brown ; under coverts glossed with the same. A band of black on the forehead, (about .20 of an inch wide in the 
middle,) passing backward so as to cover the cheek and ear coverts, and extending a little above the eye ; this band bordered 
behind by a suffusion of hoary ash, forming a distinct line above the eye, and widening behind the ear coverts into a larger 
patch, with a yellow tinge. In winter dress, and in the female, without the black mask, the forehead tinged with brown, 
the yellow ofthe throat less extended, the eyelids whitish, and an indistinct superciliary line yellowish. Length of male, 
5.50 ; wing, 2.40 ; tail 2.20. 
Hob. —North America from Atlantic to Pacific. 
The wings of this species are short and much rounded ; they reach a little beyond the basal 
third of the tail. This is considerably graduated, the outer feather about .40 of an inch 
31 b 
