76 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



One specimen, taken on south Albemarle on September 3, 

 is in about the same stage as some of the July and August birds 

 from James, in which the moult is well along. 



From the evidence given above, it appears that in adults 

 the plumage is entirely renewed during the latter half of each 

 year after the breeding season,^ which occurs in the first half 

 of the year. 



The measurements (in millimeters) of' twenty adult males 

 and twenty-three adult females yield the following extremes 

 and averages: Males— Wing 381-439 (413); tail 122-154 

 (139); culmen 117.4-132.3 (125.6); tarsus 253-322 (295); 

 middle toe 80-91.9 (86.4). Females— Wing 370-412 (384) ; 

 tail 120-143 (132); culmen 115-126 (119.5); tarsus 241- 

 306 (258) ; middle toe 73.9-89 (77.9). 



Five fresh eggs from Charles Island measure in millimeters 

 as follows: 83.5X50.9, 87.3X52.4, 89.4X51.1, 85.8X52.6, 

 86.9X52.5. They all fall below the average given by Mr. 

 Chapman for ten eggs from the Bahama Islands — 90.2X53.9.^ 



Poecilonetta bahamensis: Bahama Pintail 



Albemarle, Barrington, Charles, Chatham, Duncan, Hood, 

 Indefatigable, James, Jervis, and Seymour islands. 



The Bahama Pintail was common on Albemarle, Charles, 

 Chatham, Indefatigable, James, and Seymour islands, as many 

 as one hundred being seen together on south Albemarle. Other 

 expeditions have reported them from Barrington, Duncan, and 

 Hood islands, localities in which they were not observed by 

 us. In the crater-lake at Tower Island, four ducks were ob- 

 served swimming about, but as I was on the rim of the crater 

 two or three hundred feet above them, they could not be posi- 

 tively identified. 



The species was most common about the salt lagoons of the 

 low coastal regions, where it associated largely with the Ameri- 

 can Flamingo and the Black-necked Stilt, and, to a lesser de- 

 gree, with the Sooty Gull, the Blue-winged Teal, the Egret, 

 and the Galapagos Heron. It also frequented the fresh-water 



^"Mr. G. M. Green of San Francisco reports having found the flamingoes breed- 

 ing in the salt marshes about James Bay on James Island, and he obtained eggs in 

 August." (Snodgrass & Heller. Proc. Wash. Acad. Sci.. v. 5, pp. 253, 254.) _ It is 

 not stated whether the eggs were fresh. Those found by the Academy expedition at 

 James Bay in August, 1906, were addled. 



^Bull. Am. Mus. Nat. Hist., v. 21, p. 61. 



