54 BULLETIN 133, UNITED STATES NATIONAL MUSEUM 



on July 30, and on August 16 at the Riacho Pilaga, Formosa, one 

 was shot as it circled past a large lagoon. At Puerto Pinasco the 

 species was common and passed constantly along the river. Inland 

 in the Chaco it Avas less numerous but was noted occasionally in 

 lagoons. At Kilometer 80 one was seen September 15, and at Kilo- 

 meter 110 one was noted on September 24. 



In the Province of Buenos Aires cormorants were seen in small 

 numbers near Dolores on October 21 and 22, while near Lavalle 

 they were common from October 23 to November 15, both in channels 

 that traversed the marshes wherever there was sufficient water and 

 along the tidal reaches of the Rio Ajo. A male was taken here on 

 October 8. At General Roca, Rio Negro, single birds were observed 

 occasionally from November 24 to December 3. Near Montevideo, 

 Uruguay, on January 9 and 16, 1921, cormorants were common along 

 the beaches as far as Carrasco and w'ere observed fishing in salt 

 water, flying along parallel to the coast or resting in flocks in close 

 formation on sandy beaches. One was observed at La Paloma, 

 Rocha, on January 23, Near San Vicente, Rocha, the species was 

 fairly common on January 31 at the Laguna Castillos. On Feb- 

 ruary 2 one was noted inland at the Paso Alamo on the small Arroyo 

 Sarandi. Near Guamini, Buenos Aires, they were recorded from 

 March 3 to 8 in flocks that contained as many as 300 adults and 

 young. The species seemed to be distributed universally wherever 

 deep water or quiet lagoons offered suitable feeding grounds, though 

 most common near large streams. On the Paraguay River it in- 

 creased in abundance to the northward. 



The two specimens that I secured were both immature individuals. 



Family ANHINGIDAE 



ANHINGA ANHINGA (Linnaeus) 



Plotus anhinga Linnaeus, Syst. Nat., ed. 12, vol. 1, 1766, p. 218. (Brazil.) 



A snakebird was observed along the Riacho Quia near Las Palmas, 

 Chaco, on July 30 and 31, 1920. 



Family ARDEIDAE 



NYCTICORAX NYCTICORAX NAEVIUS (Boddaert) 

 Ardca naevia Boddaert, Tabl. Planch. Enl., 1783, p. 56. (Cayenne.) 



The only specimen taken is a female, secured October 31, 1920. 

 near Lavalle, Buenos Aires, in very worn plumage that seems to 

 be that of the second year. The bird is a peculiar shade of grayish 

 brown above with slightly indicated streaks of whitish on the crow^n, 

 neck, and lesser wing coverts. Below it is whitish with the sides of 

 tlie head, neck, and breast streaked with grayish brown. The abdo- 



