19C 



MR. H. SAUNDERS ON THE LARIN.E. 



[Feb. 



35. Larus serranus, Tsch. (Fig. 9.) 



Larus serranus, Tschudi, Wiegm. Arch. 1844, pt. i. p. 314; 

 Fauna Peruana, Aves, p. 30/ (1845-6) ; Scl. & Salv. P. Z. S. 1871, 

 p. 577. 



Chroicocephalus personatus (Natt.), Bruch, J. f. Orn. 1853, p. 104, 

 et 1855, p. 289. 



Xema cirrhocephalum, Peale ; Cassin, U.S. Expl. Exp. Orn. p. 381 

 (1858). 



Larus glaucotis, Cassin, /. c. p. 38 1 ( 1 858). 



Gavia serrana, Bp. Rev. Zool. 1855, p. 19. 



Larus personatus, Natt. ; Schl. M. Pays-Bas, Lari, p. 35 (1863). 



Gavia per sonata, Blasius, J. f. Orn. 1865, p. 372. 



Larus bonapartii, Scl. & Sa!v. P. Z. S. 1868, p. 178. 



Hab. This fine black-hooded species is found throughout the Cor- 

 dillera and the Andes of Northern Chili, Bolivia, Peru, and as far 

 north as Ecuador, whence Mr. Salvin has a specimen. It breeds 



Fig. 9. 



1. 2. 



Three outer primaries of L. serranus, ad. 



in colonies on the shores of mountain-lakes, and is well known to 

 the Quichua-speaking Indians under the name of " Quiulla," doubt- 

 less an imitation of its cry. During the bad weather it descends to 

 the west coast. The eggs and nestlings are as yet unknown to me. 



