15. LAlU'S. 



203 



towards the tip (dryiiig yellowish honi-colour) ; tinsi and toes dull 

 red. 



Immature. Like the above, but with uniuottled grey mantle and 

 wing-coverts, and an increasing proportion of white in the pri- 

 maries. 



The NcstUiuj and the Fledijllng arc probably like those of L. glau- 

 codes, the next species. 



Inasmuch as the young of this species has frequently been 

 confused with that of L. cirrhocepJialus, it may be pointed out that 

 an unfailing distinction is to be found in the colour of the under 

 wing-coverts. These are pale grey in L. maculipennis and lead- 

 colour in L. cirrhoc^plialus, which is also a larger bird. 



Hah. East side of South America, from Barra Grande, Alagoa, in 

 about 9° S. lat., to at least as far south as Chuput, in East Pata- 

 gonia ; thence westward across the Andes (which are low there) to 

 Arauco and Talcahuano on the Pacific coast. 



«. cS ad. sk. Barra Grande, Alagoa, N. Brazil, II. Saunders Coll. 



Sept. (//. M. Harrison, R.N.). 

 h-f. Ad.; (j,h. Rio de Janeiro, May 30, July 21 H. Saunders Coll. 



Juv. sk. (J. YouiKj). 



i. cJ ad. sk. Pelotas, Rio Grande do Sul Salvin-Godman Coll. 



{Juyner) 

 k, I. 6 ^ ad. sk. Monte Video, July 30( J". 1ot/«^). H. Saunders Coll. 

 m-o. 2 ad. sk. Buenos Ayres, July and April H. Saunders Coll. 



(L'ur7iu'ister). 

 p~». (5 ad., vix Partido del Ajo, Buenos Ayres, H. Saunders CoU. 

 ad., imm., et May, July, and August (£. 

 juv. sk. Gibson). 



tv, u\ cJ ad. sk. Lomas de Zaniora, Buenos Avres, P. L. Sclater Coll. 



May 30 {F. Withington).' 

 y,z. (5 ad.; a'-c'. Buenos Ayres, Aug. 

 2 imm. et juv. 



Salvin-Godman Coll. 



d'-f. 6 ad. sk. Buenos Ayres, April and Aug. 



f/. .luv. sk. Espartillar, Buenos Ayres, Sept. 



h'. Ad. St. Bahia Blanca. 



i'. Ad. sk. Chuput, Patagonia, Sept. 



k'. Ad. sk. ; I'. East Patagonia [very old]. 



Ad. St. 



m'. 5 imm. sk. Arauco, S. Chile, Aug. 



n'. c? ad. ; </. J Talcahuano, S. Chile, Sept. 



juv. sk. (Dr. Co)ypin(ier). 



p'. Imm. sk. Vina del Mar, Valparaiso. 



11. Larus glaucodes. 



II. Durnford, Esq. 



[C.]. 

 II. Durniord, Esq. 



[C.]. 

 Chas. Darwin, Esq. 



[P.]. 

 H. Durnford, Esq. 



[C.]. 

 Sir ^\ . Burnett and 



Capt. Fitzroy [P.]. 

 H. Berkeley James, 



Esq. [P.]. 

 Voy. II.M.S. 'Alert.' 



H. Berkeley James, 

 Esq. [P.]. 



Larus glaucodes, Mei/cn, Nov. Act. Acad. Cas. Leop. xvi. p. 1L5, 

 pi. .\.\iv. (1834) ; id. Beitr. Zoo/.y. 239, pi. xxxiv. (1834: Chile) ; 

 Cassin, U.S. Astronom. Exp. ii. Birds, p. 204 (1855 : Chile) ; 



