HiEMATOPUS. 



311 



H^MATOPUS NIGER ATER. 



SOUTH-AMERICAN BLACK OYSTER CATCHER. 



H.ematopus niger rostro breviore et altiore. 



Diagnosis. 



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



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

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

 Ha;matopus townsendii, Audubon, Orn. Biogr. v. p. 247 (1839). 



Hajmatopus niger ater (Vieill.), Baird, Brewer, 1$ 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. 



