3^4 



BIRDS OF THE REPUBLIC OF PANAMA PART 4 



9. Tail reddish. 



male Red-crowned Ant-tanager, Habia rubica vinacea. p. 462 

 Tail dusky, edged brownish red. 



male Red-throated Ant-tanager, Habia fuscicauda. p. 464 



10. Undersurf ace all or almost all black 11 



Undersurface not black 17 



11. Undersurface with red band across breast. 



Crimson-collared Tanager, Ramphocelus sanguinolentus apricus. p. 450 

 Undersurface entirely black 12 



12. Rump yellow 13 



Rump red or black 14 



13. No eye stripe. 



male Yellow-rumped Tanager, Ramphocelus flammigerus icteronotus. p. 448 

 Long red superciliary stripe. 



male Sulphur-rumped Tanager, Heterospingus 



xanthopygius. p. 474 



14. Rump and lower back red. 



male Scarlet-rumped Tanager, Ramphocelus passerinii. p. 444 



Rump black 15 



15. Entirely black, with concealed white patch on upper wing coverts. 



male White-lined Tanager, Tachyphonus rufus. p. 469 

 Central crown stripe orange, or exposed white patch on wing coverts. ... 16 



16. Exposed white patch on wing coverts. 



male White-shouldered Tanager, Tachyphonus luctuosus. p. 470 

 Wing entirely black, crown stripe dark orange. 



male Tawny-crested Tanager, Tachyphonus delatrii. p. 473 



17. Undersurface entirely gray or with large area of light blue 18 



Undersurface not entirely gray or with blue 22 



18. Undersurface entirely gray, rump yellow. 



Sulphur-rumped Tanager, Heterospingus xanthopygius. p. 474 



Undersurface with blue, not gray 19 



19. Undersurface entirely pale blue. 



Blue-gray Tanager, Thraupis episcopus. p. 435 



Undersurface only partially blue 20 



20. Throat black. 



Swallow-Tanager, Tersina viridis occidentalis. p. 388 



Undersurface blue and green 21 



21. Chin reddish brown, throat and breast blue. 



Bay-headed Tanager, Tangara gyrola. p. 426 

 Throat and breast green, belly blue. 



Rufous-winged Tanager, Tangara lavinia. p. 429 



22. Upper surface primarily black, blackish gray, or dark blue 23 



Upper surface lighter gray, green, yellow, or brown 39 



23. Upper surface dark blue 24 



Upper surface extensively marked with black or blackish 33 



24. Large, 130 mm or more; upper surface entirely dull blue. 



Blue-and-gold Tanager, Buthraupis arcaei arcaei. p. 434 



Small, upper surface glossy dark blue or violet-blue 25 



