246 



BIRDS OF THE REPUBLIC OF PANAMA PART 4 



51. Crown bright green or with patch of yellow 52 



Crown dull green, blue, or black 53 



52. Rump yellow. 



adult male Yellow-rumped Warbler, Dendroica coronata coronata. p. 271 

 Rump streaked green and black. 



Chestnut-sided Warbler, Dendroica pensyhanica. p. 278 



53. Crown blue or black 54 



Crown green 55 



54. Crown blue. 



adult male Cerulean Warbler, Dendroica cerulea. p. 275 



Crown black. 



male Blackpoll Warbler, Dendroica striata in alternate plumage, p. 282 



55. Undertail coverts white. 



female or male in basic plumage Blackpoll Warbler, 



Dendroica striata, p. 282 



Undertail coverts huffy. 



female or male in basic plumage Bay-breasted Warbler, 



Dendroica castanea. p. 280 



MNIOTILTA VARIA (Linnaeus), Black-and-white Warbler, 

 Reinita Trepedora 



Figure 22 



Motacilla varia Linnaeus, 1766, Syst. Nat., ed. 12, vol. 1, p. 333. (Hispaniola.) 

 Small; striped black and white. 



Description. — Length 108-125 mm. Adult male, crown black with 

 white stripe down center; back and scapulars black, streaked white; 

 rump and upper tail coverts black; middle and greater wing coverts 

 black, tipped white, forming two wing bars; remiges dusky black, ter- 

 tials edged with white; tail black with white patch on inner web of 

 outer three pairs of rectrices; superciliary white; side of face black; 

 moustachial stripe white; throat black; sides of breast, flanks, and un- 

 dertail coverts striped black, rest of undersurface white. 



Adult female, like male but with throat, side of face and most of un- 

 dersurface white. 



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

 April), wing 67.0-72.0 (69.4), tail 45.9-49.7 (47.4), culmen from base 

 11.1-13.7 (12.5), tarsus 15.2-17.2 (16.4) mm. 



Females (10 from eastern North America, taken in May), wing 

 62.0-68.0 (65.1), tail 45.6-48.6 (46.8), culmen from base 11.8-13.3 

 (12.6), tarsus 16.3-17.7 (16.9) mm. 



Migrant and winter visitor from the north. The winter range is 

 from the southern United States through the West Indies, Middle 

 America, and northwestern South America to Venezuela and Ecuador. 



