Vol. II, Pt. I] GIFFOTW— BIRDS OF THE GALAPAGOS ISLANDS 61 



pagos males, a difference which strikes the eye instantly when 

 looking over the series. The measurements of a female from 

 Camden County, Georgia, in the collection of Mr. Joseph 

 Grinnell, are included in the table. 



In the Academy's series are six Galapagos specimens in 

 Juvenal plumage, and showing no signs of postjuvenal moult. 

 They are as follows : No. 2064, Seymour, November 22 ; No. 

 2063, Charles, February 26; No. 2065, Hood, June 25; No. 

 2066, Indefatigable, July 16; No. 2061, Albemarle, August 

 11; No. 2058, Albemarle, August 31. Of these six speci- 

 mens, three still have the remains of down attached to the 

 feathers of the crown; viz., Nos. 2064, 2065, and 2058. The 

 above series would seem to indicate that the breeding-season 

 for the species continues throughout the year. 



No. 2062, Cocos Island, September 4, 1905, is beginning to 

 moult the juvenal plumage, pin-feathers appearing in the back 

 and about the head and neck. I am unable to say whether the 

 moult is the postjuvenal or the prenuptial. No. 2054, Albe- 

 marle, March 5, is evidently undergoing a similar moult, which 

 likewise has not proceeded beyond the body-feathers, although 

 it has been pretty well completed on the head and neck. The 

 same remarks apply to No. 2060, Albemarle, March 5, and to 

 No. 2059, Albemarle, March 10. " , 



Three specimens are in a striped immature plumage, which 

 evidently completely replaces the juvenal plumage, but wheth- 

 er by a postjuvenal or a prenuptial moult, I cannot say. In 

 this plumage, pale-brown occipital plumes and dusky scapular 

 plumes are present, and the black chin and throat of the adult 

 are faintly indicated. Our specimens were taken as follows : 

 No. 2057, Hood, September 29, 1905 ; No. 2056, Brattle, Oc- 

 tober 30; No. 2055, Indefatigable", November 20. 



Birds .with the black of the throat unbroken, but showing 

 immaturity otherwise, were not uncommon. This immaturity 

 usually took the form of a generally duskier and more brown- 

 ish (rather than bluish) cast to the entire plumage, and also 

 of more or less streaked under parts. No. 2052, Hood, June 

 25, is evidently passing from the plumage last described into 

 this one. No. 2053, from Cocos Island, September 8, 1905, 

 has white feathers intermingled with the black ones of the 

 throat and chin. 



