590 



BIRDS OF THE GALAPAGOS ARCHIPELAGO— BIDGWAY. vol.xix. 



with the same; under surface of piimaries, anterior to their emargina- 

 tions, pale buff, or bufty white, almost immaculate. Length (skin), 22; 

 wing, 10. ."iO; tail, 9; cuhnen, 1,19; tarsus, 2.90; middle toe, 1.95. 



Another young female, from Indefatigable Island (No. 110059 

 U.S.N.iM., April 12, 1888), is much darker than the one described, both 

 above and below, the ochraceous-buff' markings on the under parts 

 being also paler. 



This insular species is very closely related to i>. swalnsoni^ Bona- 

 parte, which it almost exactly resembles in coloration, but the bill and 

 feet are very nuich stronger. Only dark-colored adults have hitherto 

 been taken, and B. guJupaijoenHiH may possibly not have a light-colored 

 phase of plumage as has B. sicainsoni. 



Measurements of Bute o t/alapayoenuis ((lould). 



Kuni- 

 ber. 



116136 

 113 



280 



116058 

 131672 



87 

 281 



287 

 288 



Collec- 

 tion. 



U.S. 

 B. (feA. 

 B. &A. 



U.S. 

 U.S. 



B. & A. 

 B. & A. 



B. & A. 



B. &. A. 

 B. & A. 



Sex and age. 



Locality. 



Date. 



Adult male . . 



do 



do 



Adult female 



Juvenile fe- 

 male. 

 Adult female 

 do 



....do 



-do 

 .do 



Abingdon Island. 

 Chatham Island.. 

 Barriugtoji Is- 

 land. 



Apr. 16, 1888 

 June 24, 1891 

 July 19, 1891 



Average 



Indefatigable Is- 

 land. 

 Chatham Lslaud.. 



....do 



..I Barri n gt on Is- 

 land. 

 ..I Indefatigable Is- 

 land. 



..! do 



.do 



Apr. 12, 1888 



Mar. 30, 1891 



June 19, 1891 

 July 10, 1891 



July 11, 1891 



do 



July 12, 1891 



Wing.' Tail. 



15.50 

 15.10 

 15.12 



15.24 



16.10 

 16.50 



16.75 

 16.90 



16.62 



IC. 15 

 16.48 



8.55 

 9.00 



Cul 



men, ' Tar- 

 from BUS. 

 cere. 



1.07 

 1.06 



1.04 



3.03 

 2.67 

 2.79 



1.06 2.83 



1.25 I 3.20 

 1.19 1 2.90 



8.70 [1.12 2.86 

 8.75 I 1.20 ' 2.82 



8.33 i 1.25 

 8..'i0 i 1.24 



3.05 

 2.86 



Average 16.50 | 8.89 1 1.21 j 2.95 



Mid- 

 dle 

 toe. 



1.70 

 2.00 

 1.80 



1.83 



1795^ 



1.95 



2.02 

 2.10 



2.10 



2.00 

 2.02 



Family FREGATID^. 



Genus FREGATA, Cuvier. 



Fregatn, ]?ri.ss<)N, Orn. VI, 1760, 50(3. 'i'ype, I'elecanus (xjuilus, Liiinii'us. 



Range. — Tropical and subtropical seas of both hemispheres; Gala- 

 pagos Archipelago. 



FREGATA AQUILA (Linnaeus). 



Pclecanus aqiiihis, Linx.ku.s, Syst. Nat.. 10th ed., I, 1758, p. 133. 



Tachypeten aqnilus, ViKiLi.oT, Gal. Ois., 1825, pi. 274. — Sundkv.\ll, Proc. Zoul. 



Soc.,1871, p. 125 ((;alapagos). 

 Fregata aquila, Goi'i.n, Zool. Beagle, III, Birds, 1841, p. 146 (Galapagos). — 



Salvin, Trans. Zool. Soc. Lond., IX, Ft. ix, 1876, p. 497 (Galapagos).— 



Baird, Brewer, and Ridgway, Water Birds N. Amer. II, 1884, p. 128. — 



EiDGWAY, Man. N. Amer. Birds, 1887, p. 83. 



