78 BIRDS OF KAUAI ISLAND, HAWAIIAN ARCHIPELAGO. 



alba, scarcely belongs here, as from the description of the former it seems 

 to have the whole head and neck blackish with a white patch on the 

 throat ("the head, neck, and upper parts of the body dusky brown, 

 nearly black ; on the throat a whitish patch ; breast, belly, and vent, 

 white"). I do not know I\Ir. Dole's reasons for including P. alba in the 

 list unless it be Bloxham's very uncertain statement (Voy. Blonde, p. 

 252), and I think it most probable that ^. sandwichensis is the bird he 

 intended by tliat name. 



Oceanodroma cryptoleucura (Ridgw.)- 



lS82.—Cpnochor€a crypiolcucura Ridgway, Proc. U. S. Nat. Mus., IV, p. 337.— W., 

 Water B. N.Am., II, p. 406 (18?4). 



Mr. E. Ridgway, in 1882, described this species as new from two 

 specimens, collected by Mr. Knudsen (Xos. 41949 and 41950). It is 

 easily distinguished from all its allies by having the upper tail-coverts 

 white, the larger ones broadly tipped with black, and by having the 

 concealed bases of the tail-feathers, except middle pair, white. 



This is probably the unnamed ^'■Thalassldroma^^ to which Mr. Dole 

 refers (Pr. Boston Soc. K H., XII, 1869, p. 308, Extr., p. 15), and Ha- 

 waiian Almanac, 1879, p. 55. 



Gallinula galeata saudvicensis (Streets). 



Hawaiian Galliuule. Alai ula. 



1826.— I\iUca chloro}} lis B-Loxii AM, Voy. Blonde, p. 250 («ec Lixx. ). — GaUimda chloropus 



Peale, U.S. Expl. Exp., Oru., 1 ed. (p. 2-20) (^1848).— Hartlaub, Wiegm. 



Arch. Naturg., 1652, p. 137.— Dole, Proc. Boston Soc. N. H., XII, 1869, p. 302, 



Extr., p. 9. 



lSb9.—Gallinnla ? Gray, Cat. B. Trop. Isl. Pacif., p. 5^3. 



ISiO.—GaUinula galeata Gray, Haudl. B., Ill, p. 66 (part). 



IS77. —Gallhuda sandvicensis Streets, Ibis, 1877, p. 2b.— Id., U. S. Nat. Mus. Bulletin 7, 



p. 19 (1877). — FiNSCH, Ibis, 18S0, p. 78. 

 1881.— Gallinula sandvichensis Wallace, Isl. Life, p. 296. 



Mr. Knudsen sends two specimens of this representative form of the 

 American G. galeata Light., which, compared with Streets's type and 

 typical specimens of O. galeata, show that the differences between the 

 alleged two species are much smaller than supposed by the original 

 describer of G. sandvicensis. 



Dr. Streets {II. cc.) sums up the distinctive characters as follows : "[1] 

 The greater extent of the frontal plate, [2] the shorter wing, [3J the 

 absence of white on the abdomen and [4] on the under surface of the 

 wing, as well as its reduction to a mere trace on the margin of the latter, 

 [5J the more robust and different form of the tarsus, being broader and 

 more rounded in front, [C] as well as the great difference in the color of 

 the tarsus, are characters which separate it immediately from G. galeata, 

 and render its identification easy." 



(1) There are numerous American specimens in the collection before 

 me which have just as large frontal shields as the Hawaiian birds, and 

 some have it even larger. 



