48 NORTH AMERICAN BIRDS. 
whitish, sparsely speckled or spotted, chiefly round larger end, with brown and 
purplish gray. 
a‘, Lores dusky, in abrupt and marked contrast with the hoary of the forehead. 
b. Only the forehead distinctly whitish. 
Uniform sooty brown, becoming gradually grayer on neck, and pass- 
ing gradually through intermediate shades to white on forehead; 
quills nearly black. Young (?): Similar, but head uniform grayish 
brown, the frontlet hoary grayish. Length 13.00-16.35, wing 10.00- 
10.50, tail 6.00, culmen 1.75, depth of bill at base .38. Hyg averaging 
2.06 X 1.37. Hab. Intertropical seas generally, also coast of south- 
ern Atlantic and Gulf States...... 79. A. stolidus (Linn.). Noddy, 
b?, Whole top of head distinctly whitish. 
c. White of crown changing gradually into ashy on hind-neck; plumage 
of body, etc., sooty brown. Hab. Intertropical seas and coasts 
generally, including Gulf coast of Mexico. 
A. leucocapillus GouLtp. Black-cheeked Noddy.! 
c, White of crown abruptly defined against sooty brown of hind-neck; 
plumage of body, etc., sooty black. Hab. Southern Pacific and parts 
of South Atlantic, north to Uruguay. 
A. atrofuscus Stons. White-crowned Noddy.? 
a. Lores hoary whitish, like forehead. Hoary ash of occiput and hind-neck 
changing gradually into sooty brown on chin and throat, the cheeks being 
grayish. Hab. Indian Ocean, etc. 
A. tenuirostris (TemM.). Slender-billed Noddy? 
Famity RYNCHOPIDAL.—Tue Sximmers, (Page 20.) 
Genera. 
(Characters same as given for the Family)............... Rynchops. (Page 48.) 
Genus RYNCHOPS Linnaus. (Page 48, pl. VL, fig. 5.) 
Species. 
a’. Secondaries very broadly tipped with white; tail white, only the middle pair 
of feathers grayish or dusky; under wing-coverts white. Summer adult: 
Forehead, sides of head, and entire lower parts, white ; upper parts, including 
hind-neck, top of head, and ear-coverts, black, the secondaries and inner pri- 
maries broadly tipped with white; tail white, the middle feathers chiefly 
grayish brown; basal half of bill, with legs and feet, bright vermilion-red 
in life (changing to dull whitish in dried skins); terminal portion of bill 
1 Anous leucocapillue Gouxn, P. Z. 8. 1845, 103; Birds Austr. pt. vii. 1848, pl. 35. 
2 Anous leucocapilius (nec Goutp) Saunpers, P. Z. S. 1876, 670. Anous atro § 
Sei. Philad. 1894, 117. : ; sem a 
3 Sterna tenuirostrie TemM., Pl. Col. 202 (1838). Anous tenuirostris Saunpers, P, Z. 8.1876, 670, pl. 61, fig. 1. 
