PODILTMBUS. 445 



Podilymbus podicipes, Grant, Cat. Birds Brit. Mus. xxvi. p, 553"; Gates, Cat. Eggs Brit. Mus i. 



p. 138^'. 

 Podilymbus sp., Salv. Ibis, 1866, p. 200 '". 

 Podilymbus antarcticus, Hartl. Naum. 1853, p. 218 " ; Scl. P. Z. S. 1867, p. 337 =^ ; Scl. & Salv. 



P. Z. S. 1868, p. 177 ". 

 Podilymbus carolinensis (Lath.), Moore, P. Z. S. 1859, p. 65 ". 



Ptil. cestiv. Supra saturate brunneus, pileo nuchaque nigricantibus ; facie lateral! saturate brunnea ; cello 

 undique clariore brunneo ; gutture toto nigro, lateraliter albo uotato ; corpore reliquo subtus saturate 

 brunneo, vix nigricante, plumis singulis argentescenti-albo fimbriatis, pectore medio albo; remigibus 

 brunneis, intus cinerascenti-bruuneis, secundariis apices versus albidis : rostro lacteo, fascia transv«r8a 

 mediana nigra; tarso et digitis virescenti-schistaceis, intus plumbeis ; iride Isete brunnea, annulo 

 filamentoso interiore pure albo, annulo angusto exteriore ocbrascenti-albo. Long, tota circa,14-0, ate 5-4, 

 culm. 0-9, tarsi 1-65. (Descr. maris adulti ex Atitlan. Mus. nostr.) 



$ mari similis, sed minor. 



Ptil. hiem. ptilosi sestivse similis, sed gutture albo, corpore subtus albidiore, praepectore et corporis lateribus 

 ochracescenti-rufo lavatis. 



Juv. adultis hiemalibus similis, sed brunnescentior, facie laterali et gutture nigro striolatim notatis, et rostro 

 tenuiore distinguendus. (Spec. av. juv. ex Duenas. Mus. nostr.) 



Hab. NoETH America, from British Provinces southward i'^. — Mexico ^, Matamoros 

 (Dresser^), Valley of Mexico (Sumichrast^^, Herrera ^^is), Guanajuato, Ghiadalajara 

 [Buges''), Manzanilla Bay [Xantiis'^^), Laguna de Chapulco, Puebla {Ferrari- 

 Perez ^3), Schkolak, Yucatan {Stone & Baker ^^) ; Guatemala {Constancia ^), Lake 

 of Peten {Lei/land 24), Lake of Atitlan {0. S. ^^ ^^,. Richardson is), Duenas {0. S. 

 & F. D. G. ^ 19) . Panama, Castillo {ArcS ^ ^^). — South America to Southern Brazil 

 and Chile is 22^ pgru 23^ 



The Pied-billed Grebe is found in North America, from the British Provinces 

 southward, breeding nearly throughout its range 1^. In winter it occurs in most ' 6f 

 the Central-American countries, and southward to Brazil and Chile i^. 



The species also breeds in our region, for Herrera records that it is resident in the 

 A'^alley of Mexico i^. Specimens procured both by us and Mr. Richardson on the Lake 

 of Atitlan are very large, and have more black on the head and back of the neck, 

 while the sides of the face are blackish-brown, with the black colour on the throat 

 extending further down, towards the front of the neck. Mr. Grant, who has carefully 

 studied the question, and has tabulated the measurements of the large series in the 

 British Museum, has come to the conclusion that the Atitlan birds are nearly 

 approached in size and plumage by examples from other parts of America, and that 

 the differences are due to age only, and in this we are inclined to agree with him. We 

 found some nests, which were of considerable size, on the Lake of Duenas in May : 

 they consisted of a pile of flags heaped up so as to raise the edge of the structure 

 above the surface of the water, the eggs being half-immersed ; the latter were from 

 two to four in number, of a chalky exterior on an under surface of bluish-green. 



