OCT., 1909. BIRDS OF THE LEEWARD ISLANDS CORY. 241 



Family Cathartidae. 



Cathartes aura (Linn.). 



Recorded as common by Captain Robinson (Proc. U. S. Nat. Mus., 

 Vol. XVIII, 1895, p. 661); also noted by Messrs. Lowe and Clark. 

 Mr. Ferry informs me he found it common on the island; but no 

 specimens were taken. 



Catharista urubu (VieilL). 



Catharista atrata of authors. 



Mr. Ferry found this species common at sea-level, but only occa- 

 sionally at higher altitudes. No specimens were taken. 



Given by Mr. Clark as abundant near Porlamar. "Abundant 

 everywhere." (Robinson.) 



Family Falcoiiidas 



Buteo albicaudatus Vieill. 



i specimen, d\ 



"Distributed throughout the island, but nowhere common; 

 usually one pair to a locality. On March i , found a nest containing 

 three eggs in the northeastern portion of the island. The nest was 

 built on the outer branch of an acacia tree. Incubation was far 

 advanced; the female was very wild but I was able to secure the 

 male. The crop was full of grasshoppers." (Ferry.) The eggs are 

 soiled white and measure 2.25 x i .80 in. 



Falco sparverius isabellinus (Swains.}. 



Falco sparverius Robinson and Richmond, Proc. U. S. Nat. Mus., 

 Vol. XVIII, 1895, p. 661. Clark, Auk, 1902, p. 261. 



Cerchneis isabellina Lowe, Ibis, 1907, p. 556. 



6 specimens, 4 cT, 2 ? . 



The four males are all adult and have the top of 'the head blue 

 gray, without rufous, and the under parts unspotted. 



Males, wing, 6.75 to 7 ; tail, 4.85 to 5.10; tarsus, 1.20 



Females, " 7.25^7.50; " 5.25 ; " 1.25 



Gampsonyx swainsoni Vigors. 



Mr. Ferry procured a single specimen of this species, a male, taken 

 at Porlamar, February 2, 1909. Mr. Clark found it common at El 

 Valle in the summer of 1901 (Auk, 1902, p. 261). 



