Vou. II, Pr. IT] LOOMIS—A REVIEW OF THE TUBINARES 7a 
men and a point directly below it on the tomium, and the 
width of the upper mandible is the diameter at the base of the 
exposed sides of the mandible; the former dimension being 
taken with dividers and the latter with a 15 cm. caliper square. 
The length of the tail is approximate, and was obtained by in- 
serting one point of the dividers into the base of the tail be- 
tween the two middle rectrices and extending the other point 
to the end of the longest rectrix. In some instances the total 
length and the extent are given. They were taken in the flesh 
by the collectors, and have been copied by Mr. Gifford from 
the labels of the specimens. 
Cotors.—In determining colors, I have been guided by Mr. 
Ridgway’s Nomenclature of Colors and his Color Standards 
and Color Nomenclature. 
SynonyMy.—The synonymy relates to the monographs of 
Dr. Coues, Mr. Salvin, and Dr. Godman, referred to at length 
in part I. 
Diomedea nigripes Audubon: BLACK-FOOTED ALBATROSS 
Course eiemeded nigripes, V, 178, 187; Diomedea gibbosa, V, 180, 
Satvin—Diomedea nigripes, 440, 445; Diomedea gibbosa, 455. 
Gopman—Diomedea nigripes, liv, 332, pll. 94, 95. 
In his monograph Mr. Salvin includes Diomedea gibbosa 
Gould as one of the doubtful species yet to be identified,* over- 
looking Dr. Streets’s remarks on the subject published nine- 
teen years before.” All the characters of plumage ascribed to 
“D. gibbosa’”’ were found by Dr. Streets in specimens of Dio- 
medea nigripes captured at sea between Honolulu and San 
Francisco. 
_ The eighty-one examples of D. nigripes in the collection of 
the California Academy of Sciences confirm the statements of 
Dr. Streets and also explain the peculiarities of bill set forth 
by Gould in the original description.» At one extreme of 
the series are birds having the abdomen and upper and lower 
tail-coverts dark, at the other are birds having these parts 
1P, 455; cf. Sharpe, Hand-List, v. 1, p. 128, footnote. 
2 Bull. U. S. Nat. Mus. No. 7, p. 31. 
@ Ann. and Mag. N. H., 1844, v. 13, p. 361. 
