GEOTHLTPIS. 155 



Ridgw. Am. Journ. Sc. 1872, p. 459'; Baird, Brew. & Ridgw. N. Am. B.i. p. 301'; Coues, 

 B. Col. Vail. i. p. 313 "; MerriU, Pr. U. S. Nat. Mus. i. p. 124"; Scl. & Salv. P. Z. S. 1879, 

 p. 494 ". 



Supra olivacea, alis et cauda concoloribus ; oapite undique cum gutture cinereis, loris paulo nigricantibus ; guise 

 plumis intuB nigris ; pectore plaga nigra omato; abdomine toto flavo ; rostri maxilla cornea, mandibula 

 flavicante ; pedibus paUide corylinis. Long, tota 5-0, alse 2-55, caudaj 2-1, rostri a rictu 0-6, tarsi 0-84. 

 (Descr. maris ex Angostura, Costa Eica. Mus. nostr.) 



$ mari similis, sed coloribus valde dilutioribus, gutture vix cinereo tincto. 



Hab. North America, Eastern Provinces, British Provinces, and occasionally Greenland »'", 

 Texas ^ ^i.— Costa Eica, San Jose {v. Frantzius % Angostura and Dota Mountains 

 (CarmioP); Panama, Chiriqui (^rc^), line oi railway {M'Leannan^).~CoLOiiBiA, 

 Magdalena^ and Cauca valleys ^^. 



Though Mexico has been included in the range of this bird, a further examination of 

 the specimens upon which the statement was founded has shown that they really belong 

 to G. macgillivrayi, the western representative of this species ''. In Texas, however, 

 both Mr. Dresser^ and Dr. Merrill ^^ record its occurrence, the former stating that it 

 was common on passage early in May 1864. 



In Costa Eica, the adjoining State of Panama, and throughout the northern portion 

 of Colombia, G. Philadelphia is a common bird in the winter season ; but as it does not 

 touch on any of the West-Indian Islands, either during its flight southwards in autumn, 

 or during its return journey in the spring, the line of its migration doubtless lies 

 sufficiently to the eastward of the northern portions of the mainland to cause it to 

 avoid those regions, the Antilles not even being used as a resting-place en route. In 

 Costa Eica, and in the neighbourhood of Chiriqui, it is found in company with 

 G. macgillivrayi ; but in the rest of the State of Panama, and in Colombia, it entirely 

 supplants that species, the latter bird taking its place in Guatemala and Mexico. 



In the United States, where this species spends the summer months, it is reported to 

 be rare in the Eastern Province, but more abundant in the Mississippi valley, breeding 

 in numbers in Minnesota and Eastern Dakota. It also breeds in the State of New York 

 and in New England i*'. Brewer describes the nest as a massive structure placed about 

 a foot from the ground, and composed outwardly of small dry stalks and leaves, with a 

 very deep cavity lined with fine black roots. The eggs are pinkish white, marked with 

 dots and blotches of varying size of dark purplish brown ^. 



8. Geothlypis macgillivrayi. 



Sylvia macgillivrayi, Aud. Orn. Biogr. v. p. 75, t. 399. f. 4, 5 '. 



Geothlypis macgillivrayi, Baird, U. S. Bound. Surv. ii. pt. 2, Birds, p. 10'; Rev. Am. B. i. p. 227' ; 

 Scl. & Salv. Ibis, 1859, p. 10*; Scl. P. Z. S. 1859, pp. 363', 373'; Cab. J. f. Om. 1861, 

 p. 84 ' ; Lawr. Ann. Lye. N. Y. ix. p. 94 ' ; Frantz. J. f . Orn. 1869, p. 294 ' ; Salv. Ibis, 1872, 

 p. 152"; Baird, Brew. & Ridgw. N.Am. B. i. p. 303"; Coues, B. Col. Vail. i. p. 312". 



20* 



