70 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



probable that it does not differ greatly from the non-breeding state of 

 plumage, occurring in P. americanus. The breeding season of P. rollandi 

 is much later than that of P. americanus, or at least extends over a longer 

 period, as individuals in the British Museum collections taken in June are 

 still in breeding plumage. 



PODICIPES CALIPAREUS (LeSSOn). 



Podiceps calipareus, Less. Voy. Coq. Zool. I. p. 727, pi. XLV (1826: 

 Falkland Isl.); Gould. P. Z. S. 1859, p. 98; Scl. P. Z. S. 1860, p. 

 389; Abbott, Ibis, 1861, p. 162 (E. Falkland Isl.); Pelz. Reise 

 Novara, Vog. p. 140 (Chile); Scl. P. Z. S. 1867, p. 340 (Chile); 

 Durnf. Ibis, 1877, p. 45 (Chupat River), 1878, p. 405 (Central Pata- 

 gonia) ; Graham Kerr, Ibis, 1890, p. 358 (Rio Pilcomayo) ; Scl. P. Z. 

 S. 1891, p. 137 (Tarapaca). 



Podiceps occipitalis, Garn. Ann. Sci. Nat. VII. p. 50 (1826": Falkland Isl.) ; 

 Gray, Gen. B. III. p. 633 (1846); Schl. Mus. Pays-Bas, VI. Urinat. 

 p. 41 (1867: Falkland Isl., Chile); Oust. Sci. Miss. Cap Horn, 

 Oiseaux, p. 317 (1891). 



Podiceps kalipareus, Gould, Voy. 'Beagle,' Birds, p. 136 (1841: Bahia 

 Blanca: Falkland Isl.); Fraser, P. Z. S. 1843, p. 119 (Valparaiso 

 Bay); Gray, List B. part iii. p. 150 (1844); id. Gen. B. III. p. 633 

 (1846) ; Des Murs in Gay's Hist. Chil. Zool. I. p. 464 (1847) ; Yarrell; 

 P. Z. S. 1847, p. 55 (egg); Reichenb. Syst. Av. Natatores, pi. n. figs. 

 69, 70 (1848); Gray, Hand-List B. III. p. 94 no. 10756 (1871), 

 Leybold, Excurs. Pampas Argentinas, p. 20 (1871). 



Poliocephalus occipitalis Bonap. C. R. xlii. p. 775 (1856). 



Podiceps . caliparceus, Scl. & Salv. Exot. Orn. II. p. 190 (1869); iid. P. Z. 

 S. 1869, p. 158 (Tungasuca); iid. Nomencl. Av. Neotr. p. 150(1873); 

 White, P. Z. S. 1883, p. 43 (Cosquin, Cordova); Scl. & Huds. Argent. 

 Orn. II. p. 204 (1889); Schalow. Zool. Jahrb. Suppl. IV. p. 651 

 (1898: Talcalmano; Valparaiso). 



Podiceps caliparius, Scl. & Salv. Ibis, 1869, p. 284 (Chiloe); Cunn. Nat. 

 Hist. Str. Magell. p. 339 (1871). 



Podiceps calliparitis, Scl. & Salv. P. Z. S. 1879, p. 641 (Potosi, 

 Bolivia). 



