15. LARUS, 



201 



Beagle, ii. Birds, p. 142 (1811 : piirtini ; as regards La Plata and 



Patajroiiia). 

 Xema cirrhocephala, Gray (nee VieilL), List B. Brit. Mus., Anseres, 



p. 17o (1844: ])artira ; as regards E. Patagonia). 

 Larus cirrhocephalas (?i^'r fieill.), Hartl. Ind. Azara, p. 2G (1847 : 



partim); Schl. Mus. P.-Iias, Lari, p. 36 (18G3: partim) ; Sol. ^• 



Salv. P.Z.8. 18(38, p. 14(1 (partim); Hudson, I>. Z. S. 1870; 



p. 802; id. op. cit. 1871, p. 4 (Buenos Ayres) ; Scl. Sf Salv. t. c. 



p. 578 (revision Neotvop.) ; Sharpe, F. Z. S. 1881, p. l(i (Talca- 



huano, Chile). 

 Cliroicoceplialus maculipennis, Bruch, J. f. 0. 185.3, p. lOo; Licht. 



Nomencl. Av. p. 98 (18.54: S. Brazil). 

 Larus serranus (nee Tsc/iiidi), Burm. lieise La Plata-St. ii. p. 519 



(I8(il : Entre Piios, Mendoza). 

 Gavia maculipennis, Blasius, J.f. O. 1865, p. 374. 

 Larus glancodes, Saunders, P. Z. S. 1874, p. 294 (partim : as regards 



Argentina). 



Adult male in hreeding- plumage. Head cofFcc-brown, darkening 

 on the nape and throat; ej'clids and a patch behind the eye white; 



1 2 3 



Larus maculipennis, ad. 



nock, tail, and under surface white, with a roseate tinge ou the 

 breast and abdomen: mantle and wing-coverts french-grey ; second- 

 aries ])aler towards their tijis, but without any conspicuous white 

 edge ; outcrnjost jirimary white for the lower 'i inches, and black 

 above on both sides of the white shaft ; 2nd (juill with a white 

 ouler web and a black subterniinal bar on both webs (or only on 



