Vol. II, Pt. I] GIFFORD— BIRDS OF THE GALAPAGOS ISLANDS 107 



series of thirty-six males measured seventeen Had tail-feathers 

 from 600 to 790 millimeters in length (average 658), while 

 of thirty-four females only two had tail-feathers over 600 

 millimeters in length (one measured 610, the other 667; aver- 

 age 639). The remaining measurements, in millimeters, are 

 as follows: Thirty-six males — Wing 301-332 (314); cul- 

 men 60.1-69.7 (64.7); tarsus 24.8-28.2 (26.5); middle toe 

 33.5-38.1 (36.2). Thirty-four females— Wing 304-335 

 (314) ; culmen 59-70 (63.9) ; tarsus 25-28 (26) ; middle toe 

 34.2-39.5 (36.5). 



The Academy's series of fifteen eggs shows apparently the 

 full variation in markings and shape ascribed in the books to 

 the eggs of this species. The fifteen eggs, representing as 

 many sets, yield the following extreme and average dimen- 

 sions: Length 54.5-67.2 (61) ; breadth 41.1-45.1 (43). 



Phaethon rubricaudus : Red-tailed Tropic-bird 



The Red-tailed Tropic-bird was positively identified on 

 three occasions. On July 30, 1905, we saw one in latitude 

 14° 58' North, longitude 110° West. On August 21, 1905, in 

 latitude 7° 3' North, longitude 101° 36' West, one was shot, 

 but we failed to pick it up because of the speed at which the 

 schooner was sailing. On October 22, 1906, in latitude 17° 

 53' North, longitude 114° 45' West, one circled about the ves- 

 sel several times. 



On two occasions we saw birds which were unquestionably 

 of this species far north of the Tropic of Cancer. The first 

 case occurred on November 7, 1906, in latitude 29° 38' North, 

 longitude 129° 2' West, when three flew about the vessel. The 

 second case was on November 13, in latitude 32° 38' North, 

 longitude 133° 32' West, when one flew about the vessel. 



Pelecanus fuscus: Brown Pelican 



Abingdon, Albemarle, Barrington, Bindloe, Brattle, 

 Charles, Chatham, Cowley, Daphne, Duncan, Gardner-near- 

 Hood, Hood, Indefatigable, James, Jervis, Narborough, Sey- 

 mour, and Tower islands. 



When travelling along the rocky shores of the larger 

 islands, we frequently met with the Brown Pelican, usually 



