244 



BIRDS OF THE REPUBLIC OF PANAMA PART 4 



19. Crown brown or streaked 20 



Crown bright yellowish, contrasting with rest of upper surface. 



Prothonotary Warbler, Protonotaria citrea. p. 248 



20. Crown brown. 



Rufuous-capped Warbler, Basileuterus rufifrons. p. 321 

 Crown with two wide black stripes. 



Golden-crowned Warbler, Basileuterus culicivorous godmani. p. 316 



21. Forecrown yellow, contrasting with rest of crown 22 



Forecrown green, gray, or black 23 



22. Outer tail feathers with large white patches. 



female Hooded Warbler, Wilsonia citrina. p. 302 



No white on tail feathers. 



Wilson's Warbler, Wilsonia pusilla. p. 303 



23. Large, 150 mm or more. 



Yellow-breasted Chat, Icteria virens virens. p. 301 

 Smaller, 135 mm or less 24 



24. Superciliarly indistinct or absent 25 



Prominent yellow superciliary. 



Kentucky Warbler, Oporornis formosus. p. 289 



25. Black lores or mask 26 



Side of face yellowish, gray, or light brown 29 



26. Black extensive on side of face 27 



Black confined to lores and area beneath eye. 



Gray-crowned Yellowthroat, Geothlypis poliocephala ridgwayi. p. 299 



27. Most of crown gray. 



male Masked Yellowthroat, Geothlypis aequinoctialis chiriquensis. p. 296 

 Crown not extensively gray 28 



28. Forecrown black, bordered by grayish white band. 



male Common Yellowthroat, Geothlypis trichas. p. 294 

 Most of crown black, becoming green on hind crown. 



male Olive-crowned Yellowthroat, Geothlypis semiflava bairdi. p. 298 



29. Entire undersurface yellow 30 



Belly buff. 



female Common Yellowthroat, Geothlypis trichas. p. 294 



30. Much of crown and side of head gray. 



female Masked Yellowthroat, Geothlypis aequinoctialis chiriquensis. p. 296 

 Crown and side of head yellowish green. 



female Olive-crowned Yellowthroat, Geothlypis semiflava bairdi. p. 298 



31. Basal half of tail feathers light orange, 3'ellow, or buff 32 



Tail feathers entirely dark or with white patches extending to distal end. . 33 



32. Basal half of all innermost tail feathers orange or yellow. 



American Redstart, Setophaga ruticilla. p. 306 

 Basal half of all tail feathers buff. 



Buff-rumped Warbler, Basileuterus fulvicauda. p. 325 



33. Throat entirely black, brown, or gray. 34 



Throat light colored or streaked 38 



34. Throat and upper breast contrasting with rest of undersurface 35 



Entire undersurface dark gray. 



Zeledonia, Zeledonia coronata. p. 330 



