H^MATOPUS. 



311 



HiEMATOPUS NIGER ATER. 



SOUTH-AMERICAN BLACK 0Y8TEECATCHEB. 



H^MATOPus NIGER Tostro breviore et altiore. 



Diamosis. 



The North-American and South-American Oystercatchers appear completely to intergrade. Variations. 



Ostralega atra. Lesson, Traite d'Orn. ii. p. 548 (1831). 

 Hseraatopus ater, Vieillot, Gal. Ois. ii. p. 88 (1834). 

 Heematopus townsendii, Audubon, Orn. Biogr. v. p. 247 (1839) . 



Hsematopus niger ater {Vieill.), Baird, Brewer, ^ Ridgway, Water-Birds N. Amer. i. p. 109 

 (1884). 



Synonymy. 



Plates.— Vieill. Gal. Ois. ii. pi. 230 ; Aud. Orn. Biogr. pi. 427 ; Aud. Birds Am. pi. 326. 

 Habits.— Abbott, Ibis, 1861, p. 155. 

 Eggs.— Gould, Proc. Zool. Soc. 1859, p. 96. 



Literature. 



