PROCELLARIIDJi; — THE PETRELS — (ESTRELATA. 397 



CEstrelata gularis. 



PEALE'S PETREL. 



Procdlaria gularis, Peale, Zool. U. S. Exi)l. 1848, 299. 



(Edrclala gularis, Biiewst. Bull. Nutt. Orii. Club, IV. 1881, 94 (Livingston Co,, N. Y.). 

 Procdlaria mollis, "Gould," Cass. U. S. Expl. Exp. 1858, 410 (not of Goulu, 1844). 

 jEstrelatM mollis,^ CouES, Pr. Pliilad. Acad. 1866, 150 (part). 



Hab. Antarctic Ocean ; accidental in Western New York (Livingston Co., fide Brewster, 1. c.) ? 



Sp. Char. Adult 1 (type specimen, No. 15706, Antarctic Ocean ; T. R. Peale): Alxn-e, nearly 

 unilbrni brownish slate, more plumbeous on the secondaries and greater wing-coverts, which have 

 very narrow (barely visible) whitish margins ; paler, and with the basal white shining through on 

 the occiput and nape. Lores, cheeks, chin, and throat white, the two latter immaculate ; frontal 

 feather slightly margined with whitish, and superciliary region mixed with Avhite (only the tips 

 of the feathers being dusky), forming a broken superciliary stripe extending nearly to the occiput ; 

 ante- and sub-orbital regions nearly uniform dusky, but feathers with white bases. Lower parts 

 white, but this overlaid on breast, abdomen, flanks, and anal region Avith smoky plumbeous, appear- 

 ing almost uniformlj'^ of this color where the feathers are undisturbed ; jugulum transversely mot- 

 tled or vermiculated with dusky ; crissum immaculate white. Lining of wing pure white, except 

 anteriorly and exteriorly, where the color is uniformly dusky ; inner webs of primaries pure white, 

 with an abruptly defined grayish stripe next the shaft. Tail uniform brownish gray, the inner 

 web of the exterior feather white, mottled, or irregularly speckled, with gray. Bill uniform black : 

 tarsi and base of toes, with webs, pale colored (pinkish or flesh-colored in life), the terminal 

 portion of the feet blackish. 



Wing, 10.00 inches ; tail, 4.00 ; culmen, 1.05 ; nasal tubes, .30 ; length of mandible, measm-ed 

 from malar apex, .85 ; gonys, .25 ; tarsus, 1.30 ; middle toe, without claw, 1.25. 



Although Mr. Cassin (1. c.) says that the specimen described above, and which is unquestion- 

 ably the type of Procdlaria gularis, Peale, " is quite identical with the type of P. mollis, of which 

 there are numerous specimens, including those of Mr. Gould, in the museum of the Philadelphia 

 Academy," he evidently overlooked the radical difl'erence in the coloration of the under surface 

 of the wing. Dr. Coues, who examined the Philadelphia Academy series, says (1. c.) that in all of 

 these " the under surface of the wing is chiefly dusky brownish ; but there is an illy-defined and 

 interrupted area of whitish, particularly toward the base of the primaries." CE. gularis, then, must 

 be considered as more nearly related to CE. Fisheri, CE. Dejilippiana, CE. gavia, and CE. desolata, all 

 of which have the under surface of the wing mainly or largely white. 



A Petrel described by Mr. Brewster, in the " Bulletin of the Nuttall Ornithological Club " for 

 April, 1881, from a specimen obtained in Livingston Co., N. Y., in April, 1880, is supposed to 

 belong to this species. Mr. Brewster's description is as follows : — ■ 



^'' Adult (J) 'plumage (No. 5224, author's collection, Mount Morris, Livingston Co., N. Y., 

 April, 1880) : Upper parts, including tail-coverts and exposed surfaces of rectrices, pure cinereous, 

 which deepens to plumbeous only on the occiput, rump, and wings, the latter having the middle 

 and greater coverts of the same tint as the back. The feathers of the back (but not those of the 

 rump or occiput), with the greater and middle wing-coverts, broadly tipped with ashy white, 

 giving these parts a scaled appearance. The throat, jugulum, upper part of breast, and under tail- 

 coverts, pure silky white. The cinereous of the upper parts comes down along the sides of the 

 neck, encroaching more and more, and deepening in tint as it extends backward, until it throws 

 across the abdomen a broad band of nearly pure plumbeous. Around this colored tract there is 

 nowhere a definite line of demarcation ; the cinereous of the neck fades imperceptibly into the 

 white of the throat, and the edges of the abdominal bar become mingled with white, until the dark 



1 CEstrelata mollis, Gould. 



Procdlaria mollis, Gould, Ann. & Mag. N. H. XIII. 1844, 363 ; B. Austr.VII, pi. 50. — Coues, 



Pr. Philad. Acad. 1866, 150. 

 Procdlaria iixcxpcctata. Light, ed. Forst. Descr. An. 1844, 204. 

 ? CEstrelata Kidderi, CouKs, Bull. TJ. S. Nat. Mus. no. 2, 1875, 28 (= wholi^- colored phase ?). 



