NO. 1116. PROCEEDINGS OF THE NATIONAL MUSEUM. 597 



white, the outer pair wholly sooty grayish (darker termiually and on 

 most of outer web), the others gradually paler toward tlie middle jjair. 

 Iris yellow; bill dull olive-bine; bare space around bill, eyes, lores, and 

 gular sac slate-blue; legs, feet, and webs bright clear ultramarine blue 

 with a slight greenish tint on webs; claws pale glaucous-blue. 



Adult female. — Essentially like the male, but averaging slightly 

 larger; iris paler yellow; plumage rather darker, except hind neck, 

 which is less distinctly streaked. 



So far as I am able to see, Galapagoan specimens are quite identical 

 with those from the Gulf of California. Following are Mr. Adams' 

 notes on the fresh colors of the bill, etc. : 



Feet and legs ... a purplish blue, lighter than royal purple [Ridgway's Nomen- 

 clature of Colors] ; tarsus and toes possess the more blue, while the webs have more 

 of the darker purplish, especially toward their edges. Bare skin of head and throat 

 much di;ller purple, very near plumbeous. 



SULA BREWSTERI, Goss. 



Dysporus leucogaster (nee Felecanus lettcogaster, Bodd,\ekt), Suxdevall, Proc. 



Zool. Soc, 1871, p. 125 (Galapagos Islands). 

 Sula leucogastra, Salvin, Trans. Zool. Soc., IX, Pt. ix, 1876, p. 496 (Galapagos, 



fide Sundevall). 

 Sula breivsteri, Goss, Auk, V, .July, 1888, p. 242 (San Pedro Martir Island, Gulf 



of California; collection II. S. Nat. Mus.). — American Ornithologists' 



Union, Check List, abridged ed., 1889, No. 115.1. 



Specific characters. — Similar to S. leucogaster (Boddaert), but back 

 uniform in color with the neck, the head and neck paler than in that 

 species, especially the adult male, in which the former gradually fades 

 into white anteriorly; unfeathered parts quite differently colored from 

 S. leucogaster. Length, 29..50-31.50; extent of wings, 55.i")0-59.50 ; wing, 

 14-16.50; tail, 7-9; culmen to frontal feathers, 3.47-4 ; tarsus, 1.80-2.05; 

 middle toe, 2.30-2.85. 



Rayige. — Pacific coast of America and adjacent islands, from Lower 

 California to the Galapagos Archipelago: No locality (Kinberg); Tower 

 Island (Habel)?;^ Bindloe and Cowley islands (Baur and Adams). 



Adult mrt/c— Type, No. 113436, U.S.N.M.; San Pedro Martir Isle, 

 Gulf of California, March 21, 1888; N. S. Goss. Neck pale drab-gray, 

 fading gradually into white on anterior jwrtion of head, all round, and 

 deepening into smoky drab on chest; entire upper parts (except head 

 and neck) entirely uniform rich drab-brown or sepia, deei)ening on 

 primaries and rectrices into rich purplish brown or seal brown, the 

 shafts of these feathers black. Entire lower parts posterior to chest, 



' "On Tower Island also a small species [of gannet] is found with chocolate- 

 colored plumage. Of this species a specimen was caiight on board the sloop and 

 secured by tying it by one leg. . . . \\\\t on Bindloe it was liberated by somebody." 

 (Trans. Zool. Soc. Lond., IX, Pt. ix, 1876, p. 460.) 



While this may possibly have been the gray phase of S. piscator, the latter could 

 not properly be described, in any stage, as "chocolate-colored;" this term does, 

 however, tit S. hrewsteri very well. 



