220 FIELD MUSEUM OF NATURAL HISTORY ORNITHOLOGY, VOL. I. 



Mr. Ferry reached Tortuga, February 2, and left February 4, 1909, 

 remaining there less than three days. No collector had previously 

 visited the island and nothing was known regarding its fauna. The 

 results obtained in such a limited time would indicate that it is 

 worthy of further investigation. 



Family Pelecaiiidse. 



Pelecanus occidentalis (Linn.). 



Common. No specimens were taken but Mr. Ferry found a 

 large colony nesting among the mangroves on the southeastern part 

 of the island. Most of the nests contained young birds varying in 

 size. 



Family Fregatidse. 



Fregata aquila (Linn.). 



A number seen but none taken; "common" (Ferry). 



Family Columbidse. 



Chaemepelia passerina perpallida (Hartert). 



i specimen, $ , which apparently does not differ from those from 

 Margarita. 



Family Psittacidae. 

 Conurus aeruginosus tortugensis subsp. nov. 



Type 36976, Field Museum of Natural History (Tortuga Island). 



Adult male : Similar to Conurus czruginosus but differs in having 

 decidedly more orange yellow on sides of head; the throat and sides 

 of head below the orange patch paler (about the same color as aru- 

 bensis) ; the under wing coverts more yellowish green, and the 

 wings and tail longer. 



Length (skin), about 10.25; wing, 5.65; tail, 5.50; bill, .80; 

 tarsus, .43. (The measurements are in inches.) 



Mr. Ferry procured 28 specimens of this interesting bird, the 

 measurements of which are as follows: 



8 males, wing, 5 .65 to 5 .85 average 5.70 in. (144.8 mm.); tail, 

 5-45 "to 5.40 average 5.50 in. (139.7 mm.). 



20 females, wing, 5.50 to 5.80 average 5-55 in. (141 mm.); 

 tail, 5 .45 to 5 .80 average 5 .60 in. (142 . 25 mm.). 



