Vol. 5, p. 195, 196. January 30, 1926. 



Occasional Papers 



OF THE 



Boston Society of Natural History. 



TWO NEW BIRDS FROM ARGENTINA. 



BY JAMES L. PETERS. 



In a collection of birds made in Argentina by J. Mogensen, 

 and recently presented to the Museum of Comparative Zoology by 

 Dr. Thomas Barbour, there are specimens representing two new 

 subspecies of birds which are herewith described. 



Acknowledgements are due to Mr. W. E. Clyde Todd for the 

 loan of a series of Piaya cayana from Bolivia in the Carnegie 

 Museum. 



Ceophloeus erythrops fulcitus, subsp. nov. 



Type. — No. 99303, Museum of Comparative Zoology, adult male, from 

 Resistencia, Gobernaci6n del Chaco, Argentina. Collected July 19, 1915, 

 by J. Mogensen. 



Characters. — Similar to Ceophloeus erythrops erythrops (Valenciennes) x but 

 smaller; black pectoral band extending farther over the lower breast; barred 

 portion of under parts more grayish (less whitish) in appearance, owing to a 

 distinct dusky wash over the pale ground color of the barred feathers; major 

 under tail-coverts black (these same feathers in C. e. erythrops are barred). 



Measurements. 

 Ceophloeus erythrops fulcitus 



1 cf from the Argentine Chaco (type) : 



Wing, 193; tail, 146; bill from base, 42.25; tarsus, 31. 



2 9 from the Argentine Chaco: 



Wing, 179.5-189; tail, 143-148; bill from base, 38-42; 

 tarsus, 28.5-30. 

 Ceophloeus erythrops erythrops 



3 d 1 from northeastern Argentina (Misiones) : 



Wing, 199-202 (201.33); tail, 135-140 (137.5); bill from base, 45- 



46.75 (45.75); tarsus, 29.75-31 (30.25). 

 2 9 from northeastern Argentina (Misiones) : 



Wing, 188-208 (198); tail, 121-139 (130); bill from base, 44-44.5 



(44.25); tarsus, 30.5-31 (30.75). 

 2 9 from Brazil: 



Wing, 193-195 (194); tail, 118.5-129.5 (124); bill from base, 43- 



43.25; tarsus, 28-29 (28.5). 



Range. — Specimens examined only from Resistencia and Las 

 Palmas, Chaco, Argentina. 



Piaya cayana mogenseni, subsp. nov. 



Type. — No. 99263, Museum of Comparative Zoology, adult male, from 

 Concepci6n, Province of Tucuman, Argentina. Collected July 12, 1922, by 

 J. Mogensen. 



Characters. — Similar to Piaya cayana macroura Gambel 2 but smaller; 



i Diet. Sci. Nat., 40, 1826, p. 178 ("Bresil"). 



2 Journ. Acad. Nat. Sci. Phila., 1849, p. 215 ("Surinam", in error; substitute 

 type locality, " Svid-Brazilien, Paraguay und Montevideo," Cabanis and Heine, 

 Mus. Hein., IV Theil, Heft 1, 1862, p. 87, footnote). 



