150 SULIDZ. 
7. Sula brewster1. 
Sula brewsteri, Goss, Auk, v. p. 242’; A. O. U. Check-l. N. Amer. Birds, 2nd ed. p. 40°; Ridgw. 
Man. N. Amer. Birds, 2nd ed. p. 585°; Ogilvie Grant, Cat. Birds Brit. Mus. xxvi. p. 440°; 
Anthony, Auk, xv. pp. 314°, 316°, 8177; Nelson, N. Amer. Faun. no. 14, p. 29°; Rothsch. 
& Hartert, Nov. Zool. vi. p. 179°. 
&. S. leucogastre similis et noteeo fumoso-brunneo ; capite albo, collum versus grisescente: rostro cyanescenti- 
corneo; loris et regione faciali nudis indigotico-cyaneis; gutture nudo livide cyaneo vel sordide 
schistaceo-cyaneo vix viridi tincto; pedibus viridescentibus vel viridi-flavis. Long. ale 14:2-14°8, 
caudee 7:2—7°5, culm. 3°5-3°7, tarsi 1:65-1:75. (Descr. ex script. Grant, Nelson, &c.) 
Q ad. mari similis, sed major, et haud a S. leucogastra distinguenda: rostro pallide cyanescenti-corneo ; loris 
schistaceo-cyaneis vel plumbescentibus; regione orbitali et gutture nudis flavescenti-viridibus vel 
cinerascenti-flavis ; pedibus flavescentibus ; iride pallide grisea. Long. ale 15-5-15°9, caude 7-2-7°3, 
culm. 3°7-3°9, tarsi 1°75-1°85. (Descr. ex script. Grant, Nelson, &c.) 
Hab. Coasts AND ISLANDS OF THE EASTERN South Paciric OcEay, north to Lower 
California, breeding as far north as Georges Island, at the head of the Gulf of 
California 7.—RevitLaciegpo Is., San Benedicte®, Socorro ® (Anthony); Mexico, 
Coast of Jalisco (mus. Rothschild +), Piedra Blanca rocks off San Blas, Isabel I., 
Tres Marias Is., Maria Cleofa I. (£. W. Nelson §). 
Brewster’s Gannet was first described by Mr. Goss from the island of San Pedro 
Martir, in the Gulf of California, where it was breeding!. Mr. Nelson §, in his memoir 
on the birds of the ‘Tres Marias Islands, states that he found the species very numerous 
on a small hill on Isabel Island, when he landed on April 22nd, but the birds were 
not nesting and only came there to roost. They are said to breed on Piedra Blanca, 
a large rock midway between Isabel and San Blas. Only a few were seen about the 
‘Tres Marias, until an islet on the north-west coast of Maria Cleofa, rising from 150 to 
200 feet above the sea, was visited on May 30th; there many thousands of Boobies 
were breeding on the bare top of the rock. In the Revillagigedo Islands Mr. Anthony 
found the species nesting, and almost as common as S. cyanops on San Benedicte. It 
was not observed west of Rocca Partida, sixty-five miles west of Socorro. 
The nesting-habits of this species vary with the locality. At San Pedro Martir, 
Mr. Goss found but a few old feathers, bits of seaweed, and sticks used us nests on the 
ledges of the rocks, At San Benedicte, Mr. Anthony says that the nests were all 
made of sticks and coarse grass in a hollow in the sand or rocks, and that he found 
fresh eggs on May 17th®. In the Tres Marias Islands, Mr. Nelson found the eggs 
laid on bare places, which were so heated by the sun as to be uncomfortable to the 
touch. The birds defended their eggs vigorously, keeping up deafening cries of rage 
and defiance. ‘The nestlings of the few birds which flew away soon succumbed to the 
great heat of the sun. 
