328 PATAGONIAN EXPEDITIONS: ZOOLOGY 



Actodromas fuscicollis, Baird, Brewer & Ridgw. Water Birds, N. Amer. 



I. p. 227 (1884). 

 Heteropygia fuscicollis, Sharpe, Cat. B. Brit. Mus. XXIV. p. 574 (1896: 



Patagonia and Falkland Islands); Schalow, Zool. Jahrb. Suppl. IV. 



p. 660 (1898: Punta Anegada, Tierra del Fuego, Jan.); Sharpe, 



Hand-list B. I. p. 164 (1899); Salvad. Ann. Mus. Genov. (2) XX. 



p. 626 (1900: Penguin Rookery, Feb.); Martens, Hamb. Magalh. 



Sammelr. Vog. p. 15 (1900: South Patagonia and Falkland Islands). 



Fig. 168. 



Heteropygia fuscicollis. Winter plumage. P. U. O. C. 7799. One half natural size. 



General description. 



Size. — Adult Female, P. U. O. C. 7798, Near Port Gallegos, Patagonia, 

 18 January, 1898, A. E. Colburn. 



Total length, about 6.6 inches. 



Wing, 4.95 inches. 



Culmen, 0.95 inch. 



Tail, 1.8 inch. 



Tarsus, 0.9 inch. 



The sexes do not vary greatly in size, but the individual variation is 

 even more marked than in H. bairdi. The average size of H. fuscicollis 

 is on the whole smaller than in H. bairdi but individuals of H. fuscicollis 

 occur smaller than the smallest H. bairdi in the collections, and there is 

 also one individual larger than any available examples of H. bairdi. 



Color. — Adults in breeding plumage. Similar to H. bairdi, but much 

 more rufous, the feathers of the interscapular region and the scapulars being 

 broadly margined with rusty. The upper tail coverts are all white, though 

 sometimes marked with dusky. The sides and flanks are not pure white, 

 but have some dusky streaking, arrow shaped markings, or even barring, 

 on the latter region. The general prevailing tone of rufous is marked on the 



