150 SULlDiE. 



7. Snla brewsteri. 



Sula brewsteri, Goss, Auk, t. p. 242'; A. O. U. Check-1. N. Amer. Birds, 2nd ed. p. 40"; Ridgw. 

 Man. N. Amer. Birds, 2nd ed. p. 583 ' ; Ogilvie Grant, Cat. Birds Brit. Mus. xxvi. p. 440 ' ; 

 Anthony, Auk, xv. pp. 314 ', 316 ", 317 ' ; Kelson, N. Amer. Faun. no. 14, p. 29 ' ; Rothsch. 

 & Hartert, Nov. Zool. vi. p. 179 \ 



c? . S. leucogastrcF. similis et notaeo famoso-brunneo ; capite albo, collum versus grisescente : rostro cyanescenti- 

 comeo ; loris et regione facial! nudis indigotico-cyaneis ; gutture nudo livide eyaneo vel sordide 

 schistaceo-cyaneo vix viridi tincto ; pedibus viridescentibus vel viridi-flavis. Long, alae 14"2-14'8, 

 caudae 7"2-7-5, culm. 3-5-3-7, tarsi 1-65-1-70. (Descr. ex script. Grant, Ifelson, &c.) 



2 nd. mari similis, sed major, et baud a S. leucor/astra distinguenda : rostro pallida cyanescenti-corneo ; loris 

 scbistaceo-cyaneis vel plumbescentibus ; regione orbitali et gutture nudis flavescenti-viridibus vel 

 cinerascenti-flavis ; pedibus flavescentibus ; iride paUide grisea. Long, alae 15-5-15-9, caudse 7-2- 7-3, 

 culm. 3-7-3-9, tarsi 1-75-1-8.5. (Descr. ex script. Grant, Nelson, &c.) 



Eai. Coasts akd Islands of the Eastern South Pacific Oceax, north to Lower 

 California i, breeding as far north as Georges Island, at the head of the Gulf of 

 California 2. — Eevillagigedo Is., San Benedicte ^, Socorro ^ {Anthony) ; Mexico, 

 Coast of Jalisco (mus. Botlischild*), Piedra Blanca rocks off San Bias, Isabel 1., 

 Tres Marias Is., Maria Cleofa I. {E. W. Xelson^). 



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 i. 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 Sun Bias. 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 as 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 5. 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 e-gs 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. 



