GEN. 280-281 or key. 103 



540. STERCORAEIUS POMATORHIWUS (Temm.) Lawr. 

 Pomiii'ine Jaeg'ei*. 



5il. STERCORARIUS PARASITICUS (Bkunn.) Gray. 

 RicSaai'cljiun'is Jaeg'er. 



542. STERCORARIUS BUFFONI (Bote) Coues. 

 Ai*ciic oFa^'ger; liOaagr-tailecl Jaeg'er. 



543. LARUS GLAUCUS Brunn. 



€^liti!icoiis chilli. 



644. LARUS LEUCOPTERUS Faber. 



545. LARUS GLAUCESCENS Liciit. 

 OJiiucous-^viiigred ^ull. 



646. LARUS MARINUS L. 

 Ci^i'cat 151a€M-I»sitek4^<t €^«il]. 



547. LARUS ARGENTATUS Brunx. 

 Herring* €<iiI9; Common Oull. — 



547a. LARUS ARGENTATUS BrUxVN., 

 var. SMiTHSONiANus Coues. 

 American Herring* CInll. 



547b. LARUS ARGENTATUS Brunn., 

 var. occiDENTALis (Aud.) Coues. 

 IVestern Herring: Ciull. 



548. LARUS DELAWAREWSIS Ord. 



Hing'-Isilled Ci^nll. 



548a. LARUS DELAWAREITSIS Ord, 

 var. CALiFORNicus (Lawr.) Coues. 

 Californian €ru91. 



649. LARUS CANUS L., 

 var. BRACHYRHYNCHUS (Rich.) Coues. 

 American ITle^v €}ull. 



