BIRDS SYLVICOLIDAE — GEOTHLYPIS TRICHAS. 



241 



B. — Tail rounded. Head all round ash ; the feathers 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. pMladelpJiia. 



Fore part of breast like throat ; forehead and lores black ; eyelids with a white 

 patch G. macgillivrayi. 



Comparative measurements of species. 



GEOTHLYPIS TEICHAS, C a b a n i s . 



Maryland Yellow-throat. 



Turius trichas, Linn. Syst. Nat. I, 1766, 293.— Gmelin, Syst. Nat. I, 1788. 



Sylvia Irichas, Latham, Ind. Orn. II, 1790. — Vieillot, Ois. Am. Sept. II, 1807, 28 ; pi. xxviii & xxix. — Aud. Orn. 



Biogr. I, 1832, 120 : V, 1838, 463, pi. 23 & 240. 

 Ficedula trichas, Brisson, Orn. 

 Geothlypis trichas, Cabanis, Mus. Hein. 1850, 16. 

 Ficedula marilandica, Brisson, Orn. Ill, 1760, 506. 

 Si'lvia marilandica, Wilson, Am. Orn. I, 1808, 88 ; pi. vi, f. 1. 



Trichas marilandica, Bon. List, 1838.— In. Consp. 1850, 310.— AuD.Syn. 1839, 65.— Ib. Orn. Biog. II, 1841, 78; pi. 102, 

 Regulus mystaceus, Stephens, Shaw, Zool. Birds, XIII, ii, 1826, 232. 

 Trichas personatus, Swainson, Zool. Jour. Ill, 1827, 167. 

 Sylvia roscoe, Aud. Orn. Biog. I, 1832, 124 ; pi. 24. (Young male.) 

 Tnchas 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 bright 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 abovo 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. 



Hab. — 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 

 31b 



