NO. 1116. PROCEEDINGS OF THE NATIONAL MUSEUM. 499 



Specific characters. — Plain light olive above, somewhat grayer on head 

 and neck ; under jjarts light buffy or cream-bulf, shaded with-light olive 

 laterally; adult male with superciliary stripe, chin, and throat cinua- 

 moii-tawny or tawny ochraceous; mandible always {%) pale colored. 



Range. — Galapagos Archipelago : James Island (Darwin, Townsend, 

 Baur and Adams). 



Adult onale. — No. 556, collection Dr. G. Baur, James Island, August 

 17, 1891. Pileum and hind neck olive-gray; rest of upper parts light 

 olive; wings and tail dusky, feathers edged with light olive, the middle 

 wing-coverts broadly tipped and the greater coverts broadly edged with 

 wood brown. A superciliary stripe, extending from bill to about 0.15 

 of an inch behind the eye, lower eyelid, malar region, chin, and throat 

 cinnamon-tawny or deep tawny ochraceous ; lores and suborbital region 

 pale dull buffy ; ear-coverts light buffy grayish ; median portion of breast 

 and abdomen and under tail-coverts cream-buff, many of the feathers 

 of the breast marked with a more or less concealed, ill-defined spot of 

 pale tawny, the shorter under tail-coverts tinged with the same color; 

 lateral lower parts deep grayish buffy. Upper mandible dusky, lower 

 entirely pale; "iris dark brown;" legs deep horn brown, the feet consid- 

 erably darker. Length (skin), 3.G0; wing, 2.15; tail, 1.40; exposed 

 culmen, 0.32; tarsus, 0.80; middle toe, 0.48. 



Young male.—^o. 115995, U.S.N.M., James IsJand, April 11, 1894. 

 Above similar to the adult, but plumage of looser texture, and wing- 

 coverts margined terminally with cinnamon-buffy ; beneath as in adult, 

 excex)t anteriorly, the chin, throat, and chest, as welJ as supraloral and 

 superciliary regions, being dull buffy whitish or very pale dull grayish 

 buffy. 



It is singular that, although figured in the Zoology of the Beagle 

 (Birds, 1)1. 44, lower figure '), the plumage of the adult male, as described 

 above, has hitherto been undescribed, all authors, from Darwin and 

 Gould to Salvin, ignoring it. It is so very distinct from the ordinary 

 (immature) plumage as to give a decided impression at first of repre- 

 senting a different species. The specimen above described is the deep- 

 est colored of four adult males in the collection of Messrs. Baur and 

 Adams, all the others being considerably paler, both as to the general 

 color of the under parts and the tawny color of the throat, etc. 



The two remaining specimens are also males, and were collected on 

 the same dates as those in the tawny-throated plumage ; but they are 

 both evidently young birds, as are also the two Albatross specimens, 

 collected Aj)ril 11, one of the latter being a male, the other with sex 

 undetermined. 



All specimens seen of this species have the under mandible light 

 colored. 



1 The figure is, however, very badly colored. 



