27O BIRDS OF THE REPUBLIC OF PANAMA PART 4 



pair with large white patch on basal half of inner web; side of face 

 gray, with lores, forehead, and malar region becoming black by March, 

 and lower and upper rims of eye and stripe behind eye beginning to 

 appear in February, prominent by March; undertail coverts white, rest 

 of undersurface bright yellow with black streaks beginning at breast, 

 becoming increasingly prominent after February; underwing coverts 

 white. 



Adult female, as male but duller, with black on back fainter or ab- 

 sent, black on face absent, and streaks on undersurface fewer or absent. 



Measurements. — Males ( 10 from the breeding range, taken in June 

 and July), wing 57.5-61.8 (59.8), tail 45.2-51.1 (48.4), culmen from 

 base 8.4-11.3 (10.0), tarsus 16.1-17.8 (17.1) mm. 



Females ( 10 from the breeding range, taken in May, June, and July) , 

 wing 55.1-58.7 (56.8), tail 43.1-48.5 (46.1), culmen from base 8.7-11.3 

 (10.3), tarsus 16.1-18.1 (17.5) mm. 



Winter visitor from the north. Uncommon, but regular in very 

 small numbers at least on the Caribbean slope. The Magnolia Warbler 

 has been recorded on migration in Bocas del Toro at Almirante, where 

 2 were banded on October 21, 1962 (Loftin, Carib. Journ. Sci., vol. 3, 

 no. 1, 1963, p. 67) and 1 was taken at Cocoplum on November 5, 1927 

 (Chapman, Auk, 1931, p. 121) . One of the birds banded at the Gorgas 

 Memorial Laboratory station at Almirante on October 21, 1972, was re- 

 captured there 5 weeks later on December 7 (Loftin, Bird-Banding, 

 1963, p. 220). McLeannan forwarded 2 specimens from what became 

 the Canal Zone to Salvin (Salvin and Godman, Biol. Centr.-Amer., 

 Aves, vol. 1 (pt. 9), 1881, pp. 129-130); these are now in the British 

 Museum. Lawrence (Ann. Lyc. Nat. Hist. New York, vol. 7, 1861, p. 

 322) records it as taken in the same area by McLeannan and Galbraith, 

 and I secured 2 females at Juan Mina in the Canal Zone, on January 12 

 and 17, 1955. There are several recent sightings from eastern Province 

 of Panama as far east as the Bayano River valley (Ridgely, 1976, p. 

 293), and I saw 1 at Jaque, Darien, on March 29, 1946. This species is 

 usually found at low levels in second-growth woodland, where it often 

 forages with mixed flocks. Ridgely (in litt.) has found them in man- 

 groves. 



In 1977 Magnolia Warblers were recorded on the exceptionally late 

 dates of May 27 (Achiote Road, Canal Zone, N. G. Smith) and May 

 28 (Maje Island, Bayano River, C. Lowe) (Toucan, vol. 4, no. 7, 1977, 

 p. 2). Smith observed that other northern migrants, including Seiurus 

 noveboracensis, Icterus galbula, 3 species of swallow, Coccyzus ameri- 

 canus, and C. erythro phthalmus , remained very much later than usual. 



