BIRD LIFE IN THE URUBAMBA VAIJl,EY OF PERU. 49 



(261) FULICA ARDESIACA Tschudi. 



Fulica ardesiaca Tschudi, Arch, fiir Naturg., 1843, vol. 1, p. 389 (Peru). — Sclater 

 and Salvin, Proc. Zool. Soc, 1869, p. 156 (Timgasuca). 



(263) FULICA GIGANTEA Eydoux and Souleyet. 



Fulica gigantea Eydoux and Souleyet, Voy. Bonite, 1841, p. 102, pi. 8 (Peru). 



Restricted to the Puna Zone. 

 La Raya, 1. 



Order PODICIPEDIFORMES. 



Family PODICIPEDIDAE. 



GREBES. 



(289) PODICEPS AMERICANUS Garnot. 



Podiceps amerkanus GARyiOT, Voy. Coquille, Zool., vol. 1, 1829, p. 599 (Chile). 

 Podiceps rollandi Sclater and Salvin, Proc. Zool. Soc, 1869, p. 158 (Tungasuca). 



(272) PODICEPS C^LLIPARAEUS iUNINENSIS Berlepsch and Stolzmann. 



P. calliparaeus juninensis Berlepsch and Stolzmann, Ibis, 1894, p, 112, prov. 



descr. (Lake Junin, Peru). 

 Podiceps calipareus Sclater and Salvin, Proc. Zool. Soc, 1869, p. 158 (Tungasuca). 



Comparison of 13 specimens from Puho, 6 from Lake Jimin, and 

 3 from La Raya, with 2 birds in breeding plumage from the Falkland 

 Islands, confirms the subspecific distinctness of the race inhabiting 

 the Puna Zone of Peru. Titicaca specimens average slightly larger 

 than those from Junin and La Raya birds seem to be somewhat 

 larger than either. 



La Raya, 2 males, 1 female. 



Order LARIFORMES. 



Family LARIDAE. 



SKIMMERS, gulls; SKUAS. 



(311) LARUS SERRANUS Tschudi. 



Lams serranus Tschudi, Archiv fur Naturg., 1844, vol. 1, p. 314 (Peru). — Sclater 

 and Salvin, Proc. Zool. Soc, 1869, p. 158 (Tinta). 



An abundant species of the Puna Zone, descending the streams to 

 the Subtropical Zone. 



Ollantaytambo, 1; San Miguel Bridge, 1. 



2787—21 4 



