LARIDJE. 357 



LARID^. 



410. Stercorarius pomarimiS, Temm. Pomarine Skua. 



Lestris pomarinus, Gould's Birds of Europe, pi. 440. 

 Coprotkei-es pomarimis, Gray's Hand-list of Birds, No. 10941. 



[Mr. Andersson's last collection contained two skins of this 

 speciesj one of which was ticketed as haviag been obtained in 

 Walwich Bay. — Ed.] 



411. Stercorarius parasiticus (Linn.). Eiehardson's Skua. 



Lestris Richardsonii, Gould's Birds of Europe, pi. 441. 

 Stercorarius spinicauda, Layard's Oat. No. 681. 

 Lestris Richardsonii, Chapman's Travels in S. Afr., App. p. 425. 

 Stercorarius parasiticus, Gray's Hand-list of Birds, No. 10937. 



This bird is not uncommon on many parts of the 

 south-west coast of Africa ; and I have often killed it at 

 Walwich Bay. 



It frequents the innermost shallows and lagoons on 

 the coast, but is not equally abundant throughout the 

 the year, apparently retiring from that part of the coast 

 during the breeding-season. 



This species rarely fishes for itself, but compels the timid 

 Gulls and Terns to disgorge their captures for its benefit. 



412. Larus vetula, Bruch. Soutt- African Black-backed Gull. 



Larus vetula, Bruch, in Journ. fiir Om. 1853, p. 100, pi. 2. fig. 4 



(head). 

 Larus doniinicanus, Layard's Cat. No. 682. 

 Larus fuscus, Chapman's Travels in S. Afr., App. p. 425. 



This is a very common Gull all along the south-west 

 coast of Africa, from Walwich Bay to Table Bay. It 

 is a most voracious feeder, preying on the dead carcasses 



