SULIDjE: GANNETS, BOOBIES. 955 



parts of the world; casual in Florida; perhaps N. on Mexican coast to Lower California? 

 The species should have been taken into the Key with S. ajanops in 1884 (Lawr. Pr. Bost. 

 Soc. Nat. Hist, xiv, p. 303). Pelecanus piscator L. J758; Sulci piscator Gray, 1845; 

 CouES, Key, 3d ed. 1887, p. 890 ; Ridgw. Man. 1887, p. 7G ; A. 0. U. Lists, 1886-95, 



No. [116]. 



S. (S.) neboux'i. (To — Neboux.) Blue-footeu Booby. Neboux's Booby. Goss' 

 Booby. Adult ^ ?: Bill dull olivaceous blue; sac and face slaty-blue; iris yellow ; feet 

 brio-ht blue. Pkunage white, plain below, but head and neck streaked with brown or dark 

 Cray, and back and scapulars dusky with only whitish tips. Primaries brownish-black ; second- 

 aries like wing-coverts ; tail-feathers white and brown to varying extent. Downy young pure 

 white. Length 34.00 ; extent (i-2.00-<i6.00 ; wing 15.75-16.75 ; tail 8.75-9.75, composed of 

 16 feathers; bill 4.20-4.70 ; tarsus about 2.00. A large Booby resembling cyanops in some 

 respects and piscator in others, but easily distinguished by the blue feet, etc. Gulf of Cali- 

 fornia and S. to the Galapagos and Chili. It breeds in profusion on San Pedro Martir Is- 

 land in the Gulf near lat. 28°, and on Tres Marias Islands. Egg single, 2.40 X 1-60, long 

 ovate, color as usual, but generally stained with guano ; laid on bare rock, A))ril, May. 

 S. neboiixii Milne-Edw. Ann. Sc. Nat. 6th Ser. Zool. xiii, 1882, p. 37, pi. 14 ; Ridgw. Man. 

 2d ed. 1896, p. 584 ; A. 0. U. Suppl. List, Auk, Jan. 1897, p. 124. S. gossi Ridgw. MS. 

 Goss, Auk, V, July, 1888, p. 241 ; Coues, Key, 4th ed. 1890, p. 906; A. 0. U. List, 2d ed. 

 1895, Xo. 114.1. 



S. (S.) brew'steri. (To William Brewster, the eminent ornithologist of Cambridge, Mass.) 

 Green-footed Booby. Brewster's Booby. Adult $ : Bill dull olivaceous-blue; sac 

 bluish; face indigo-blue; feet pea-green. Adult 9- l^iH bluish-horn color, fading to dirty 

 buff after death; face slate-blue; sac pale greenish; feet greenish-yellow. In (J 9 j iris dark 

 brown with a whitish ring. Adult i^ 9 • Phimage not so extensively w^hite as that of any of 

 the foregoing, this being a "brown" Booby, more like the next species {S- sulci). Upper 

 parts brown, lightening through gray to white on head and throat of $, darkening on quills 

 and tail ; under parts white from the breast. Nestlings covered with white down. Length 

 29.50-31.50; extent 55.50-59.50; wing 14.50-15.50; tail 8.00; tarsus 1.75-2.00; culmen 

 3.50-4.00; 9 averaging larger than $. Gulf of California and southward, breeding numer- 

 ously on San Pedro Martir Island and the Tres Marias Islands with S. neboitxi, and on other 

 islands to the head of the Gulf. Eggs 2, 2.44 X 1-60, laid in a sort of nest on the ground, 

 otherwise indistinguishable from those of nehouoci, laid in May and June. The species was for- 

 merly identified with the common Brown Booby. S. hreivsferi Goss, Auk, July, 1888, p. 242 ; 

 Cokes, Key, 4th ed. 1890, p. 905; A. O. U. List, 2d ed. 1895, No. 115.1. 

 S. (S.) su'la. (Etym. that of the generic name.) Common Booby. Brown Booby. Yel- 

 low-footed Booby. Catesby's Booby. Adult ^ 9: Bill and bare parts of heatl liiclit- 

 cnlored, very variable, inclining to greeni.sh or yellowish ; feet similar ; all drying indefinably 

 li^ht ; iris white. Plumage dark brown, abruptly white below from the neck, including lin- 

 iui,' of wings. Young : Plumage grayish-brown, paler below, more or less mixed with white 

 on the parts wliich are to become pure white; bill and feet obscured. The full plumage is 

 imibably assumed after the third year. Length 28.00-30.00; extent 50.00 or more; wine 

 I l..")0-16..>0, averaging nearly 16.00; tail 6.50-9..")0, averaging about 8.00. composed of 12- 

 14 feathers; tarsus 1.50-1.90; middle toe and claw 3..")0 ; ctilmen 3.25-4.00, averaging 3.75 ; 

 gape 5.00 ; depth of bill at base 1.25. A long and well known species, widely dispersed over 

 warm seas of most parts of the world, and the only Booby which inhabits the U. S. to any 

 great extent ; it is abundant on our South Atlantic and Gulf coasts, N. to Georgia, but ap- 

 parently is not found on the Pacific side, where it is replaced by hrcwsteri. It swarms at its 

 breeding places on low shores and keys, where it builds a nest of sticks and weeds on buslies ; 

 one egg or two, 2 2.")-2..")0 X 1.50-1.75, of tiie same chalky character as tliat of the whoh' 



