•] 



MR. H. SAUNDERS ON THE LAKIN^i. 



203 



I have selected the primary of the oldest L. maculipennis I could 

 find as presenting the least amount of black, and therefore closest to 

 L. glaucodes ; but, in spite of that, the difference is quite recognizable. 



41. Lartjs glaucodes, Meyen. (Fig- 14.) 



Larus glaucodes, Meyen, Obs. Zool. p. 115, pi. xxiv. ; id. Beitr. 

 Zool. p. '239, pi. xxxiv. (1834); Gay, Faun. Chil. Aves, i. p. 480 

 (1847); Cassin, Birds U.S. Astronom. Exp. p. 204 (1855); Scl. & 

 Salv. JSTom. Av. Neotrop. p. 148 (1873). 



Larus glaucotes, Cabanis, Ibis, 1861, p. 312. 



Larus glaucotis, Schlegel, Mus. P.-B. Lain, p. 42 (1863). 



Xema cirrhocephalum, Gould, Zool. Beagle, iii. p. 142 (1841), 

 part., nee Vieill. 



Xema cirrocephala, Gray, List Birds Brit. Mus. iii. p. 173 (1844). 



Fie. 14. 



1. 2. 3. 



Three outer primaries of L. glaucodes, old. 



Xema glaucodes, Boie, Isis, 1844, p. 192 ? 



Larus albipennis, Peale, Zool. U.S. Expl. Exp. p. 288 (1848) ; 

 fide Cassin, in Orn. U.S. Expl. Exp. p. 379 (1858) ; Chili. 



Larus albipennis, Licht. M.S.; Gray, List B. Brit. M. p. 173 

 (1844), type in Berlin Mus. (examined, H. S.). 



Chroicocephalus glaucotes, Bruch, J. f. Orn. 1853, p. 105, et 1855 

 p. 291. 



[49] 



