GEN. 281-291 OF KEY. 105 



550. LARUS EBURWEUS Gm. 



Ivory Omll. 



551. LARUS BELCHERI Vigors. 



ItVliite-lieaded <^uSl 



552. LARUS TRIDACTYLUS L. 



J£ittiivake Oull. 



552a. LARUS TRIDACTYLUS L., 

 var. KOTZKBUi (Bp.) Cones. 

 Pacific Kittitvake. 



553. LARUS BREVIROSTRIS (Brandt) Coues. 



^Iioi't-lbilled I£itti^vake. 



554. LARUS ATRICILLA L. 



l.aiigr]iingr Oiill. 



555. LARUS TRANKLINI Rich. 



Fraukliii'is IlOisy Oiill. 



656. LARUS PHILADELPHIA (Ord) Coues. 

 ]toiiai»ai-te'iS OiiU. 



557. RHODOSTETHIA ROSEA (Macgill.) Bp. 



^Vedge-tailed Oiill. 



558. XEMA SABINEI (Sab.) Bp. 



f'ork-tailed C^^iill. 



659.^ XEMA rURCATUM (Neboux). 

 fitvallOYV-tailcd Gl^ull. 



6G0. STERNA ANGLICA Montagu. 

 Oull-billcd Tern ; ITlar^lt Tern. 



561. STERNA CASPIA Pallas, 

 var. imperator Coues. 

 Caspian Tern. 



662. STERNA REGIA Gambel. 

 Royal Tern. 



