74 NORTH AMERICAN BIRDS. 



Genus PHAETHON Linnaeus. (Page 73, pi. XVIIL, fig. 1.) 



Species. 



Common Characters. — Plumage very compact, satiny ; color white (sometimes 

 tinged with pink or salmon-color), varied with blackish on upper parts ; bill red, 

 orange, or yellow in adults ; tarsi and base of toes yellowish, rest of feet black. JVest 

 a cavity among rocks on sea-shore of oceanic islands. Egg ovate, dilute claret- 

 brown or whitish speckled, sprinkled, spotted, or blotched with deep claret-brown. 



a 1 . Elongated middle tail-feathers with their webs very much broader than the 

 moderately rigid shaft. 



6 1 . Bill yellow or orange. Adult : lengthened tail-feathers pinkish or salmon- 



colored, with black shafts ; no black bars on upper parts, the black being 

 in form of patches on scapulars, etc. Young : Upper parts irregularly 

 barred with black ; tail-feathers marked with a black spot near the end, 

 the middle pairs not elongated. Length (of adult, including lengthened 

 tail-feathers) 25.00-32.00, wing about 11.00, elongated tail-feathers 20.00, 

 or less, culmen 2.25. Egg 2.21 X 1-54. Sab. Intertropical seas, chiefly 

 middle western Atlantic, especially in vicinity of the Bermudas and 

 throughout West Indies, north to Florida; South Pacific (Samoan 

 Islands) ; accidental in western New York. 



112. P. flavirostris Brandt. Yellow-billed Tropic Bird. 



6 2 . Bill coral-red. Adult: Lengthened middle tail-feathers pure white, with 



white shafts (except toward base) ; upper parts irregularly barred with 

 blackish. Young: (Not seen.) Length (of adult with perfectly devel- 

 oped middle tail-feathers) 30.00-35.00, wing 11.75-12.50, elongated tail- 

 feathers 22.00, or less, culmen about 2.50. Egg 2.22 X 1-59. Sab. Coasts 

 of tropical America (both sides), north to Lower California and "West 

 Indies ; casual at the Newfoundland Banks. 



113. P. sethereus Linn. Red-billed Tropic Bird. 

 a'. Elongated middle tail-feathers with their webs much narrower than the very 

 rigid shaft. 



Bill yellowish. Adult : Lengthened middle tail-feathers dull reddish, with 

 black shafts ; wing 13.00, or more, culmen about 2.50. Sab. South 

 Pacific. 



P. rubricaudus Bodd. Red-tailed Tropic Bird. 1 



Family SULID.5L. — The Gannets. (Page 73.) 

 Genera. 

 (Characters same as for the Family) Sula. (Page 75.) 



1 Phaeton rubricauda Bodd., Tabl. P. E. 1783, 67 (ex Buff. PI. Bnl. 979). 



