PODILYMBUS PODICEPS, PIEB-BILLED GREBE. 737 



toward the end, where more obtuse and less hooked ; commissure not so suddenly dc- 

 curved, nor to such extent. Legs rather longer and stouter than in P. podictp^. Gular 

 patch extending further around on sides of head ; under parts more heavily mottled 

 ■with dusky. 



PODILYMBUS PODICEPS, (Linn.) Lawr. 

 Pied-billed Grebe; Diibchick; Water-witch. 



a. podiccps. 



Colymlus podiceps, Linn., Syst. Nat. i, 1766, 22.3 (bsised on P. mifloi- rosiro ratio, Gates., 



91; C.fiuviatiUn caioVmmsis, Biiiss., vi, 6;i).— Gm., Syst. Nar. i, 176-^, 51)4. 

 Pndihjvibus podiccps, Lawk., B. N. A. IHiiS, 898.— Coop. & Suck., N. K. Wash. Ter. 1860, 



283.— Codes, Pr. Phila. Acad. 1862, 233.— Codes, Key. 1872, 338; aud of most 



late United States writers. 

 Sylhcocyclus podiccps, Bp. 



Colymbus ludovicianns, Gm., Syst. N.at, i, 1788, 592. 

 Podiceps Ivdovieianus, Lath., Ind. Orn. ii, 1790, 785. 

 Podiccps caroUnensis, Lath., Ind. Orn. ii, 1790, 785.— Bp., Svn. 1828, 418.— Sw. & Eicn., 



r. B. A. ii, 1831, 412.— Ndtt., Man. ii. 1834, 259.— Add., Orn. Biog. iii, 1835, 359; 



Syn. 1839, 358 ; B. Am. vii, 1844, 324, pi. 483.— Gin., B. L. I. 1844, 382.— Max., 



J^ f. O. vii, 1869, 248 ; and of writers generally. 

 Sylbeoajclus caroUnensis, Bp., List, 1838, 64. 

 Podilymhus Uiicaius, Heeem., Pr. Phila. Acad. 1854, 179; P. E. E. Eep. x, 1839, 77, pi. 9- 



(very youug). 

 Sylheocyclus lineatus, Bp. 



b. antarcticus. 



Podiccps caroUnensis, Spix, A. B. pi. 100. 



Podiccps antarcticus, Lesson. 



Sylbeocyclus antarcticus, Bp. 



Podilymbus antarcticus. Gray, Hand-list, iii, 1871, 95, No. 10771. 



Podiccps brevirosiris, Gkay, Genera of Birds, iii, 1839, pi. 172. 



Quid " euryies, Bp."— Geay, Hand-list, No. 10772, ex Montevideo ? 



Hah. — North, Centr.al, .and part of South America. West Indies. (Guatemala, 

 breeding, ScL., Ibis, i, 1859, 234. Yeragu.i, Salv., P. Z. S. 1870, 219. Venezuela, SCL. 

 & Salv., P. Z. S. 1869, 252. Brazil, Pelz., O. B. 322; Eeinh., V. D. Med. 1870, 18. 

 Cuba, CaI!., J. f. 0. iv, 1656, 431. Jamaica, ScL., P. Z. S. 18C1, 81.) Var. antarcticus 

 from Southern South America. 



Adult, breeding plumage.— ^iW light dull bluish, dusky on upper mandible, encircled 

 with a»broad bl.ick band. Frontal and coronal bristles black. Crown, occiput, and 

 neck behind, grayish-black, the feathers with slightly lighter edges. Sides of heacl aud 

 neck brownish-gray. A broad black throat-patch, extending on sides of lower man- 

 dible. Upper parts brownish-black, the feathers with scarcely lighter edges. Prima- 

 ries aud secondaries chocolate-brown, the latter frequently with a white area on the 

 inner webs. Under parts ashy, washed over with silvery-gray, thicklj', though obso- 

 letely, mottled with dusky ; these d.irk spots most numerous and evident on the sides. 

 Lower belly nearly uniformly du.sky. 



Winter plumage.— \i\\\ light dull yellowish, without a dark baud, more or less dusky 

 on the ridge. No gular patch. Crowu and occiput dusky browo. Upper parts with 

 more evident pale edgings of the feithers than in summer. Neck, breast, and sides, 

 light brown, darker posteriorly, where more or less conspicuously mottled with dusky. 

 Under parts otherwise pure silky-white, immaculate; lower belly grayish. 



Tottng-of-tlie-year. — White gular patch invaded by streaks of the brownish of the 

 head, and the latter much streaked with white. Otherwise as iu the preceding. 



Dimensions. — Length, about 13 ; extent, 24 ; wing, about 5 ; bill along culmeu, 0.75 ; 

 along gape, 1.20; height at nostrils, 0.40; width, 0.25; tarsus, 1.50; middle toe .and. 

 claw, 2.15. 



There is no species of this country with which the present requires comparison, as- 

 its generic peculiarities suffice for its recognition under auy circumstances of plumage. 

 The slight peculiarities of var. antarcticus have been already giveu. 



Published Deccnibei; 1874. 



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