58 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



Bill shorter, less than 17 mm ; side of head streaked with white, or buffy 

 white 15 



15. Throat white Beautiful margarornis, Margarornis bclhdus, p. 71 



Throat buflf, or cinnamon-bufif. 



Spotted barbtail, Prcmnoplcx brunncsccns, p. 75 



16. Shafts of rectrices stiff and firm for entire length ; bill somewhat flattened, 



more slender, height at nostril about equal to width 27 



Shafts of rectrices flexible at distal end ; bill heavier, height at nostril 

 decidedly more than width 17 



17. Tail black, or very faintly rufescent. 



Ruddy leaf-gleaner, Autoiiwlus rubiginosiis saturatus, p. 96 

 Tail distinctly chestnut, rufous, or cinnamon 18 



18. Wings mainly bright rufous ; side of head cinnamon-rufous like throat and 



chest, except for a plain grayish brown streak behind eye. 



Buff-fronted leaf-gleaner, Philydor riifus rufcscens, p. 92 



Wings dull brown or grayish brown ; side of head darker than throat, 



usually streaked 19 



19. Wings gray ; tail and rump bright cinnamon-brown 20 



Wings reddish brown ; tail and rump chestnut to rufous-brown 21 



20. Under surface light rufous-brown ; back rufous to chestnut ; crown only 



slightly darker than back. 



Rufous-rumped leaf-gleaner, Philydor crythroccrcus juscipennis, p. 90 

 Duller above and below ; decidedly less rufous except on side of neck and 

 in superciliary behind eye. 



Rufous-rumped leaf-gleaner, Philydor crythroccrcus crythronotus, p. 91 



21. A distinct throat patch of yellow, buff, or white, different in color from 



breast 22 



Throat, foreneck, and upper breast similar in color and pattern 24 



22. Throat patch light yellow. 



Lineated leaf-gleaner, Syndactyla subalaris, adult, p. 84 

 Throat patch buff or white 23 



23. Crown and hindneck definitely streaked with buff, no well-marked super- 



ciliary ; buff throat patch narrower, with side of neck streaked. 



Striped leaf-gleaner, Hyloctistcs subnlatus, p. 82 

 Crown and hindneck very faintly streaked; a buff superciliary; the white 

 or buff throat patch extending over side of neck. 



Buff-throated leaf-gleaner, Antomolus ochrolaemus, p. 97 



24. Smaller ; foreneck and upper breast dull yellowish white, faintly bordered 



with grayish brown ; rest of under surface grayish brown faintly lined 

 with dull yellowish white. 



Scaly-throated leaf-gleaner. Anabaccrthia variegaticeps, p. 88 



Larger ; foreneck and upper breast distinctly cinnamon-buff to rufous ; rest 



of under surface reddish brown 25 



25. Crown dark rufous with faint shaft lines of pale cinnamon ; foreneck and 



breast not streaked. 



Ruddy leaf-gleaner, Autoinolus rubiginosus jumosus, p. 94 

 Crown dark grayish brown, the feathers edged with black to produce indefi- 

 nite lines ; throat and breast more or less streaked 26 



