PODILYMBUS PODICEPS, PIED-BILLED GREBE. 737 



toward tlie end, where more obtuse and less hooljed ; commissure not so suddenly de- 

 curved, nor to sucli extent. Legs ra,ther longer and stouter than in F. podiccps. Gular 

 patch exteudiug further around on sides of head ; under parts more heavilj- mottled 

 -with dusky. 



PODILYMBUS PODICEPS, (Linn.) Lawr. 



Pied-billed Grebe; Dabchick; Water-witch. 



a. podiceps. 



Colymbus podlceps, Linn., Syst. Nat. i, 17(36, 223 (based on P. mivor rostro vario, Gates., 



91; C. ftuviatiUH vaivIituiDtix, Bi:i.s.s., vi, 6:)).— Gm., Syst. Na'. i, \7ti^, r)<)4. 

 PndihjmhuH podiceps, Lawi?., B. N. A. It;;")^, H98.— Coop. & Suck., N. H. Wash. Ter. 1800, 



283.— CouES, Pr. Phila. Acad. 18G2, 233.— Coues, Key. 1872, 338; and of moat 



late United States writers. 

 Sylheocydus pod'tcips, Bp. 



Cohimbus htdoviciaiius, Gm., Syst. Nat, i, 1788, 592. 

 Fodiccpa ludovkianus, Lath., Ind. Orn. ii, 1790, 785. 

 Podiceps caiolhiciisis, Lath., Ind. Orn. ii, 1790, 785.— Bp., Syn. 1828, 418.— Sw. & Rich., 



F. B. a. ii, 1831, 412.— NuTT., Man. ii. 1834, 259.— Aup., Orn. Biog. iii, ld35, 359; 



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



j' f. O. vii, 1859, 248 ; and of writers generally. 

 Sylheocychis carolinenfiis, Bp., List, lf38, 64. 

 Fodilymbus Uiuntiis, Heerm., Pr. Phila. Acad. 1854, 179; P. R. R. Rep. x, 1859, 77, pi. 9 



(very young). 

 Sylheocydus Hiieatus, Bp. 



b. antarcticus. 



Podiceps carolinensis, Spix, A. B. pi. 100. 



Podiceps autarcticus, Le.sson. 



iSiilbeoeychis autarclicus, Bp. 



Podilyinhus (ditardicus, Gray, Hand-list, iii, 1871, 95, No. 10771. 



I'odiceps hiei-irostris, Gray, Genera of Birds, iii, 1839, ])1. 172. 



Quid ''eiirytes. Bp."— Gray, Hand-list, No. 10772, ex Montevideo? 



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

 breeding, ScL., Ibis, i, 1859, 234. Veragua, Sal,v.. P. Z. S. 1870, 219. Venezuela, SCL. 

 & Salv., p. Z. S. 1869, 2.52. Brazil, l>Ki.z.,- O. B. 322; Reinh., V. D. Med. 1870, 18. 

 Cuba, Ca15.. .J. f. O. iv, 1856, 431. Jamaica, Scl., P. Z. S. 1861, 81.) ^'ar. antarcticus 

 from Southern South America. 



Adult, breeding phmayc—BWl light dull bluii«h, dusky on upper mandible, encircled 

 with a broad black baud. Frontal and coronal bristles black. Crown, occiput, and 

 neck bchiud, grayish-black, the feathers with slightly lighter edges. Sides of head and 

 nock brownish-gVay. Abroad black tlnoat-patch, extending on sides of lower man- 

 dible. Upjier parts brownish-black, tlie feathers with scarcely lighter edges. Prima- 

 ries and .secondaries chocolate-brown, the latter freiiueutly with a white area on the 

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

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

 Lower beJly nearly niiilbrinly dusky. 



Winter plumar,e.—\V\\\ light dull yellowish, without a dark band, more or less dusky 

 on the ridge. No gular patch. Crown and occiput dusky brown. Upper parts with 

 }nore evident i)ale edgings of tlie feathers than in suuMuer. Neck, breast, and sides, 

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

 L'iKler jiarfs otherwise pure silUy-white, immaculate; lower belly grayish. 



3'<)«»r/-o/-//ic-.i/(«»-.— White gular jiatch invaded by streaks of the browni.sh of the 

 head. iHid the latter nuuli streaked with while. Otliervv isc as in the i)rece(liug. 



Dimcns'ons. — Lengili, about 13 ; extent, 24 ; wing, about 5 ; l)ill 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. 



Tliero is no species of this country with which the present requires compari.son, as 

 its generic peculiarities sutlice for its ret'ognitiou under any circumstances of plumage. 

 The slight peculiarities of var. antarcticun have been alreaily given. 



Published December, 1874. 

 47 



