FAMILY TYRANNIDAE 359 



White-ringed flycatcher, Coryplwtriccus parvus albovittatus, p. 406 

 Hindneck without white (except as noted in footnote 1 ) 27 



27. Bill long, narrow throughout, length 21.7-25.0 mm; feathers of hind crown 



somewhat elongated. . .Lesser kiskadee, Pitangus lictor panamcusis, p. 420 

 Bill short, broader at base 28 



28. Darker above, more dusky ; crown black ; with inner webs of wings 



rufescent. 



Rusty-margined flycatcher, Myiocctctcs cayancnsis harterti, p. 408 

 Grayer above, including the crown ; inner webs of wings not strongly 

 rufescent. 



Vermilion-crowned flycatcher, Myiozetctes similis columbianus, p. 410 



29. Upper breast and foreneck gray in adult (varied to whitish in part in 



juvenile dress); lower breast, sides and under tail coverts yellow; bill 



broad, heavy, in color dark to dusky 30 



Not as in the above 33 



30. Smaller ; wing not more than 80 mm ; crown black. 



Dusky-capped flycatcher, Myiarchus tuber ciilijer, p. 429 

 Larger ; wing more than 85 mm 31 



31. Paler, grayer above with crown and hindneck lighter -colored ; an indistinct 



dark line through eye. . .Tropical kingbird, Tyrannus iiielancholicus, p. 383 

 Darker, more dusky above, crown and back mainly similar in color. ... 32 



32. Tail feathers with inner webs entirely rufous ; brighter yellow below. 



Great crested flycatcher, Myiarchus crinitus, p. 422 

 Tail without rufous (or if present in juvenile, the rufous reduced to a 

 narrow margin around the web) ; paler yellow on abdomen. 



Short-crested flycatcher, Myiarchus fero.r panamcnsis, p. 426 

 2)i. Bill short, broad at base, the basal width more than three-fourths the 



length 34 



Bill not much broadened basally in proportion to its length 38 



34. Larger, tail longer, two-thirds or more the length of wing 35 



Smaller, tail shorter, less than half the length of wing. 2>7 



35. Upper surface dusky ; breast and sides streaked with dusky. 



Piratic flycatcher, Legatus leucophaius, p. 388 

 Upper surface grayish green 36 



36. Darker grayish green ; more heavily marked on breast and sides ; a narrow 



white ring around eye. 



Eye-ringed flatbill, Rhyncliocyclus brevirostris, p. 514 

 Lighter grayish green ; less heavily marked on breast and sides ; white 

 ring around eye narrower, less evident. 



Olivaceous flatbill, Rhynchocychis olivaccus bardus, p. 512 



37. Throat white ; darker, more reddish brown above. 



White-throated spade-bill, Platyrinchus inystaceus ncglcctus, p. 504 

 Throat pale yellow' ; greener on the back. 



Golden-crowned spade-bill, Platyrinchus coronatus supcrciliaris. p. 501 



38. Breast band, under tail coverts, and tail dull brown ; size medium. 



Brown flycatcher, Cnipodcctcs subbrunncus panamcnsis, p. 506 

 Not as above 39 



