18780 



MR, H. SAUNDERS ON THE LARIN.E. 



203 



I have selected the primary of the oldest L. muculipennis 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. Larus 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. Nom. Av. Neotrop. p. 148 (1873). 



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



Larus glaucotis, Schlegel, Mas. P.-B. Lari, p. 42 (1863). 



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

 part., nee Yieill. 



Xema cirrocephala, Gray, List Birds Brit. Mus. iii. p. 1/3 (1844). 



Fig. 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 On. U.S. Expl. Exp. p. 3/9 (1858) ; Chili. 



Larus albipennis, Licht. M.S. ; Gray, List B. Brit. M. p. 1 73 

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



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

 p. 291. 



