450 



PHEGOENIS. 



Post-Pliocene Glacial Epoch, it is reasonable to suppose that it also occurred in others after 

 the Prse-Pliocene Glacial Epoch. We must therefore be prepared to find in the southern 

 hemisphere a few isolated species whose differentiation from their alHes dates back to a 

 period before the Pliocene Age, and which may therefore claim to be generically distinct 

 from the other species in the family. One of these is the Chilian Sandpiper (or Mitchell's 

 Slenderfoot of Eraser) ; the ancestors of this species had probably become residents of Peru 

 and Chili before the Pliocene Age. A second species is Forster's Sandpiper (the White- 

 winged Sandpiper of Latham), which found a permanent home on the Society Islands ; 

 and a third is Peale's Sandpiper (the Barred Phalarope of Latham) which is a resident of 

 the Paumota Archipelago. 



KEY TO THE SPECIES. 



The three species may be distinguished as follows : — 



Underparts barred ^ 



[ mitchelli. 



"^ cancellatus . 

 leucopterus • 



A hind toe. 



PHEGORNIS MITCHELLI. 



CHILIAN SANDPIPER. (Plate XVI.) 

 Diagnosis. Phegornis corpora subtus fasciato : halhice nullo. 



Synonymy. 



Literature. 



Variations. No local races of this species are known. 



Leptopus mitchellii, Fraser, Proc. Zool. Soc. 1844, p. 157. 

 Leptodactylus mitchellii {Fraser), Fraser, Proc. Zool. Soc. 1844, p. 157 

 Leptoscelis mitchellii [Fraser), Des Murs, Icon. Orn. pi. xli. (1846). 

 Phegornis mitchellii (Fraser), Gray, Genera of Birds, iii. p. 545 (1847). 



PLATEs.-Fraser, Zool. Typ. pi. 63; Des Murs, Icon. Orn. pi. xli. 

 Habits.— Fraser, Zool. Typ. letterpress to pi. 63. 

 Eggs. — Unknown. 



