5S4 APPESDIX. 



1.60-1.G5), ciilmou .9S-1.0S, tarsus 1.15-1.28, mitklle to?, with elaw, 1.48- 

 l.Go. Hub. North western Pacific (Buiiin Islands, etc.). 



M. hypoleuca Salv. Bonin Petrel.' 



(6.) Page 71, after O. homochroa : 



— . Oceanodroma socorroensis Tow.nse.nd. Socorro Petrel.' 

 Similar to 0. honiochroit, but rather larger; wing dcciJcdly longer; tail 

 shorter and less deeply forked, with lateral leathers decidedly broader ; bill 

 longer; coloration perceptibly darker, especially the under parts, the under wing- 

 coverts without the light-colored patch always consijicuous in 0. homochroa ; 

 shorter lateral upper tail-coverts pale gray, somctimos whitish, producing a more 

 or less conspicuous light-colored patch on each side. Wing 5.80-6.38 (6.11), tail 

 3.07-3.42 (3.22), forked for .71-.92 (.77), culmeu .58-.65 (.62), nasal tubes .23-.29 

 (.27), tarsus .S2-.9r) (.90), middle too, with claw, .88-.93 (.90). Hab. Socorro 

 Island, Eevillcgigedo group, and Coronados Island, Lower California. 



(7.) Page 71, after O. cryptoleucura : 



100.1. Oceanodroma macrodactyla (Bry.vnt). Guadaltipe Petrel.' 

 Similar to 0. cryptoleucura, but much lai'ger, the tail much more deeply 

 forked, feet proportionally larger, and reetrices not extensively, if at all, white 

 at the base ; length about 8.40, wing 6.10-6.70, tail 3.30-3.90 (forked for .90- 

 1.40), culmcn .60, tarsus .86-1.00, middle toe, with claw, 1.10-1.18. Hub. Guada- 

 lupe Island, Lower California. 



(8.) Page 75, after S. cyanops : 



141.1. Sula nebouxii .Mii.ne-Edwards. Blue-footed Booby.' 

 Head, neck, and entire under parts white, the first two streaked with sooty 

 graj'ish ; back and 8eaj)ulars dusk}' brownish, the feathers tipped with whitish ; 

 legs and feet deep blue in life. (Young unknown.) Length about 32.00-34.50, 

 wing 15.50-17.50, tail 8.00-10.00, culmen 3.98-4.55, tarsus 1.85-2.30, middle toe 

 2.65-3.05. Hab. Pacific coast, frour Gulf of California to the Galapagos Archi- 

 pelago and coast of Chili. 



\9.) Pago 75, after " d\ Feet greenish or yellowish" cancel what follows and 

 substitute : 



e". Color of head and neck uniform dark sooty brown, in both sexes, abrupth' 

 defined above against the lighter brown of the back. Hab. Tropical and 

 subtropical water.s on the Atlantic side of America, north to Georgia ; 

 also various parts of eastern hemisphere... 115. S. sula (Linn.). Booby. 



' (Etlrelala hypoleuca Salvin, Ibis, July, 18S8, ."iSO (Kruscnstorn Islnnd). 



» Oceanoilroma locorroenait Towns., Proc. U. S. Nat. Mus. .tiii. No. 79'J, Sept. 9, 1S80, 1.14. 



• Oceanodroma leucorhoa mncriid<iclglii BiiVA.NT, Bull. Cnlif. Acnd. Sci. ii. No. 8, July 2.1, 18^7, 450. 

 — Oceanodroma macroilaclyla A. 0. U., Cbcck List, abridged od. 1880, No. KIC.l. 



« Sula nehouxii Mii.NE-Enw., Ann. Soc. Nat. Zool. b2, Ann. vi. 8cr. T, xiii. No. 2-1, Art. I, p. ,37, jil. 11 

 (C\i\\\).—S:iUi gotiii RiDcw., Auk, v. July, ISS8, 211 (Gulf of California). 



