1869.] 



307 



[Dole. 



Gmelin, Syst. Nat., I, p. 607 (descr. fals.). Latham, Ind. Ornith., 

 p. 807. Gould, Birds of Austr., VII, pi. xxx. 



Ad. Tota sericeo-alba, unicoior; rostro nigro, basi pulchre violas- 

 cente-C£eruleo ; pedibus palllde cagruleis, membranis interdigitalibus 

 flavis; iride fusco-nigra. Long. 10.5 poUices ; caud. 3.5 pollices. 

 (Finsch und Hartlaub.) 



A single ogg is laid on a bare branch of a tree, a knot or slight 

 cavity being its only protection. It is 1.6 in. long and 1.2 in. in diam- 

 eter, the ends nearly alike in form; color brownish Avhite, sprinkled 

 with thread-like spots and patches of burnt umber. (Peale.) 



43. Anous Stolidus Cassin, U. S. Expl. Exped., Mam. and 

 Ornith., p. 391. Finsch und Hartlaub, Ornith. Central-Polynesiens, 

 p. 234. A. stolidus et f rater Coues, Proc. Acad. Nat. Sci. Pliilad., 

 1862, p. 558. Baird, Birds of North America, p. 865. Gould, Birds 

 of Austr., pi. xxxiv. A. pileatus et stolidus, Pelzeln, Novara Exped., 

 Vogel, p. 155. A. niger Stephens, Gen. Zobl., XUI, p. 140 (1825). 

 Oio of the natives? Sperm-whale bird. 



Ad. Pulchre fuliginosus; reraigibus majoribus et cauda fere nigris; 

 pileo albicante-cano ; loris nigricantibus ; rostro et pedibus nigris; 

 iride fusca. Long. 20 pollices. (Finsch und Hartlaub.) 



The differences between the American and Pacific forms of this 

 bird are thus tabulated by Dr. Coues, loc. cit. 



AMERICAN. 



Length of wing 10 to 10.5 in. 



Length of tail about 6 in. 



Height of bill at base .38 in. 



Length of tarsus 1 in. 



Length of middle toe and claw 1.45 in. 



Middle toe and claw 1.45 length of 

 tarsus. 



Central tail feathers but slightly short- 

 er than the next. 



Occiput bluish plumbeous, becoming 

 pure white on the front. Sides of 

 head and neck all round with a de- 

 cided wash of bluish plumbeous. 

 Feet nearly black in dried specimen. 



PACIFIC 



Length of wing 11 to 11.25 in. 



Length of tail a,bout .7 in. 



Height of bill at base .43 in. 



Length of tarsus 1 in. (same). 



Length of middle toe and claw 1.60. 



Middle toe and claw 1.60 length of 

 tarsus. 



Central tail feathers half an inch 

 shorter than the next. 



Occiput brownish ash, becoming ashy 

 white (not pure) on the front. Sides 

 of head and neck not notably dif- 

 ferent from general fuliginous. 

 Feet reddish brown in dried skin. 



The dimensions of a specimen I shot in lat. 20° 30' N., long. 154° 

 W., were as follows: — Total length 13 in., spread of wings 22.77 in., 

 length of bill 2 in. Flight rapid and unsteady. Breeds on the sea 

 cliffs on the Hawaiian Islands. 



