1915 HYPOTHETICAL LIST 177 
far as Cape Colnett, Lower California, and is likely to be observed sooner or 
later north of the Mexican boundary. 
ilzk (alaly16)) Sula brewsteri Goss 
BREWSTER BooBy 
Synonyms—Sula fiber; Sula fusca; Sula bassana (?); Gannet (?) ; Booby. 
Status—Newberry (Pac. R. R. Rep., vi, 1857, pp. 107, 108) records seeing 
two species of Sula ‘‘off the coast of California’? during a voyage from San 
Francisco to Panama. One he ealls: ‘‘Sula bassana. The Gannet’’; the other: 
**Sula fusca. The Booby’’. It is not probable that any species of the genus was 
seen north of Lower California. Of the two or more species occurring off the 
west coast of Mexico, Sula brewsteri is the one which has been found farthest 
north and hence is the one most likely to be detected as a stray above the Mexi- 
can line. 
12 (120b) Phalacrocorax auritus cincinatus (Brandt) 
WHITE-CRESTED CORMORANT 
Synonyms—Phalacrocorax cincinatus; Phalacrocorax dilophus cincinatus, 
part. 
Status—Supposed to be a winter visitant northerly: San Francisco Bay 
(Kobbe, Bailey’s Handbook Bds., 1902, p. xlix; see also Baird, Brewer, and Ridg- 
way, Water Bds. N. Amer., 1, 1884, p.,150; and A. O. U. Check-List, 3rd ed., 
1910, p. 63). The occurrence of this form in California is difficult to verify be- 
cause of absence of series of winter specimens of the awritus group for critical 
determination. I cannot see that there are as yet good grounds for including 
cincinatus in our main list. The form breeds in Alaska. 
13 (169.1) Chen caerulescens (Linnaeus) 
BLuE GoosE 
Status—But one record: Two shot near Stockton ‘‘about February 1’’, 1892 
(Belding, Zoe, m1, 1892, p. 97) ; parts of one of the birds were saved and submit- 
ted to Ridgway, who is stated (Belding, loc. cit.) to have determined them as 
above. I do not know whether or not the fragments are yet in existence, but 
since the bird was pronounced a juvenal by Ridgway, and since there is said to 
be difficulty in distinguishing the young plumages in the Snow and Blue geese, 
the record seems open to question, more particularly because of absence of con- 
firmation. (See Swarth, Condor, xv, 1913, p. 43.) The Blue Goose winters reg- 
ularly in the Gulf States, with no positive record at any season west of the Mis- 
sissippi Valley. 
14 (172b) Branta canadensis occidentalis (Baird) 
WHITE-CHEEKED GOOSE 
Status—Until quite recently supposed to be a regular winter  visitant 
through the interior, even as far south as San Diego (Belding, Zoe, m1, 1892, p. 
100). Supposed also to be the form breeding in the northeastern section of the 
