SYLVICOLID^ — THE WARBLERS. 



297 



Eyelids dusky (except in 9) ; a black patch on jugulum of (J- 9- 

 Throat tinged with yellow. Hah. Eastern Province of North America; 

 in winter south to Panama \ax. Philadelphia . 



Eyelids white ; no black patch on jugulum. 9 . Throat not tinged 

 with yellow. Hah. Western and Middle Province of United States ; 

 in winter south to Costa Rica (Western Coast) . var. macgillivr ay i. 



20017 



Geothlypis trichas, Cab ax. 



MARYLAND YELLOW-THROAT ; BLACK-MASKED GROUND WARBLER. 



Tardus trichas, Linn. S. N. 1766, 293. Sylvia trichas, Lath. ; AuD., etc. Geothlypis 

 trichas, Cab. Mus. Heiu. 1850, 16. — Bairp, Birds N. Am. 241; Rev. 220. — Gund- 

 LACH, Cab. Jour. 1861, 326 (Cuba). — Sclater, Catal. 1861, 27, no. 167. — March, 

 Pr. A. N. Sc. 1863, 293. — Lord, Pr. R. Art. Inst. Woolwich, IV, 1864, 115 (X. W. 

 Boundary). — Jones, Nat. Bermuda, 29. — Samuels, 205. —Cooper, Orn. Cal. I, 

 1870, 95. Sylvia marilandica, Wilson. Trichas mar. Bon. Regulus mystaceus, 

 Stephens. Trichas personatus, Swainson. Sylvia roscoe, Aud. Triclms hrachydac- 

 tylus, Swains. 



Other localities quoted : Xalapa, OaoMca, Cordova, ScL. Guatemala, ScL. & Salv. Baha- 

 mas, Bryant. Costa Rica, Cab. ; Lawr. Orizaba (autumn). Sum. Yucatan, Lawr. 



Figures: Vieill. Ois. II, pi. xxviii, xxix. — Aud. Orn. Biog. I, II, V, pi. xxni, cii, ccxi. 

 — WiLS. I, pi. vi, fig. 1. — BuFFON, PI. enl. 709, fig. 2. 



Sp. Char. (No. 26,024 $.) Wings a little shorter than the somewhat graduated tail. 

 Bin slender, the depth contained about two and a half 

 times in distance from nostrils to tip. First quill about 

 equal to seventh. Forehead to above the anterior edge 

 of the eye, and across the entire cheeks, ears, and jaws, 

 and ending in an angle on sides of neck, black, with a 

 suffusion of hoary bluish-gray behind it on the crown and 

 sides of neck ; the occipital and nuchal region grayish- 

 brown, passing insensibly into the olive-green of the up- 

 per parts. Chin, throat, jugulum, edge of wing and cris- 

 sum rich yellow (the latter paler) ; rest of under parts, 

 with lining of wings, yellowish-white, the sides tinged 

 with brownish ; outer primary edged with whitish, the others with olive-green. Bill black ; 

 legs yellowish. Total length, 4.40; wing, 2.15; tail, 2.30; graduation. .25; width of outer 

 tail-feather, .28 ; difference between first and third quills, .15 ; length of bill from forehead, 

 .52 ; from nostril, .30 ; along gape, .60 ; tarsus, .75 ; middle toe and claw, .66 ; claw alone, 

 .18 ; hind toe and claw, .48 ; claw alone, .26. 



Male in winter, and the female, without the black mask ; the forehead tinged with 

 brown, the yellow of the throat less extended, the eyelids whitish, and a yellowish super- 

 ciliary line. 



Hab. The whole L^nited States, from Atlantic to Pacific, and south to Costa Rica ; Ber- 

 muda (October) ; Bahamas ; Cuba ; Jamaica. 



The young bird is brownish-olive above, becoming more virescent on the 

 rump and tail ; eyelids, and whole lower parts, soft light buff, with a faint 

 tinge of yellow on the breast and lower tail-coverts. 



There is very much variation manifested in a large series (containing more 

 than one hundred and thirty specimens, principally North American), though 

 38 



Geothlypis trichas. 



