630 



NAT A TORES. 



LA.RrtXE. 



LARIDJE. 



RICHARDSON'S SKUA. 



Lestris Richardsonii. 



Larus parasiticus, Arctic Gull, PENN. Brit. Zool. vol. ii. p. 179, 



adult. 

 crepidatus, Black-toed,, p. 178, 



young. 



parasiticus, Arctic MONTAGU, Ornith. Diet, adult. 

 crepidatus, Black-toed,, young. 



parasiticus, Arctic BEWICK, Brit. Birds, vol. ii. p. 250, 



adult. 

 crepidatus, Black-toed } , p. 252, 



young. 

 Cataractes parasiticus, Arctic Skua, FLEM. Brit. An. p. 138. 



