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BIRDS OF THE REPUBLIC OF PANAMA PART 4 



DENDROICA STRIATA (Forster): Blackpoll Warbler, Reinita Coroninegra 



Muscicapa striata J.R. Forster, 1772, Phil. Trans, vol. 62, art. 29, read June 18 

 and 25), pp. 406, 428. (Fort Severn, Ontario.) 



Small; both sexes in basic plumage, dull yellowish green streaked 

 with black on upper surface; undersurface white, tinged yellow, some- 

 times slightly streaked with black. Adult male in alternate plumage, 

 streaked black and white. 



Description. — Length 115-126 mm. Adult male in basic plumage, 

 side of head and upper surface olive-green, becoming gray on rump 

 and upper tail coverts, and finely streaked with black, especially on 

 crown and upper back; wing coverts blackish, with middle and greater 

 ones tipped white, forming two wing-bars; remiges blackish, with 

 outer webs edged olive-green; tertials edged whitish; rectrices blackish 

 with white patches on webs of outer two pairs; undersurface white, 

 tinged yellow on sides of throat, across breast, and on sides and flanks, 

 and finely streaked with black on sides and flanks; underwing coverts 

 white. 



Adult male in alternate plumage, crown black; nuchal band streaked 

 black and white, rest of upper surface light gray, becoming brownish on 

 rump and upper tail coverts; upper back streaked with black; wings and 

 tail as in basic plumage; side of head and undersurface white, with a 

 broad black streak running from chin, along side of throat, to side of 

 breast; sides and flanks streaked with black. 



Adult female in basic plumage, like male in basic plumage, but with 

 less streaking on back, often absent from crown, and yellow tinge more 

 extensive on undersurface. 



Adult female in alternate plumage, like male in basic plumage. 



Measurements. — Males (10 from North America, taken in May), 

 wing 69.5-75.5 (72.5), tail 48.5-52.7 (50.1), culmen from base 11.1- 

 12.6 (12.1), tarsus 17.1-19.6 (18.8) mm. 



Females (10 from North America, taken in May), wing 68.0-73.0 

 (69.5), tail 47.3-50.7 (48.1), culmen from base 11.5-12.4 (12.0), tar- 

 sus 18.2-19.6 (18.9) mm. 



Accidental. There is an adult male specimen in full spring plumage 

 in the British Museum marked as taken in Panama by McLeannan 

 that was received in the Tweedale Collection with no further data. The 

 form of the skin, in the arrangement of wings and feet and the manner 

 in which the bill is closed, is typical of the method employed by Mc- 

 Leannan, so that there is no reason to doubt the locality. This collector's 

 activities centered along the line of the Panama Railroad, mainly on 

 the Atlantic slope near the former station of Lion Hill (now covered 



