NO. 1116. PFOCEEDIKGS OF THE NATIONAL MUSEUM. G23 



with an elongated white patch, occupying- the greater part of the inner- 

 most secondaries (not tertials), and more or less of the basal or sub- 

 basal i^ortion of the outermost, the greater wing-coverts also margined 

 terminally with white; upper tail-coverts white, mottled at tips with 

 dusky, the longer coverts witli half an inch or more of their terminal 

 portion sooty black; tail similar in color to the back, but extensively 

 white at base, this occupying about the basal half of the exterior 

 feather. Lower part of chest irregularly clouded or blotched with 

 dusky or white, this mottled space about 1 inch across in middle portion; 

 rest of under parts, including under tail-coverts, immaculate white; 

 under wing-coverts white, with considerable spotting of slate-black 

 along the margin and a large patch of dark brownish slate on the 

 carpometacarpal region; inner webs of ])rimaries entirely uniform 

 brownish slate. Bill (in dried skin) reddish; legs and feet (in dried 

 skin) light brownish orange.' Length (skin), 16; wing, 10; tail, 3.80; 

 culmeu, 3.35; depth of bill at nostril, 0.40; greatest depth of bill, 0.50; 

 tarsus, 2.12; middle toe, 1.61. 



Immature.— 1^0. 101320, U.S.N.M.; Chatham Island, August 16, 1884; 

 Dr. William H. Jones, U. S. N. Essentially identical with the adult, 

 as described, in plumage, but bill mainly dusky brown, and legs and 

 feet much duller in color. "Bill red, nearly black toward tip; iris 

 golden yellow; lids reddish; feet slate or grayish." (Jones, MS.) 

 Length (before skinning), 18.25; extent of wings, 33; wing, 10; tail, 

 3.80; culmen,3.12; depth of bill at nostrils, 0.43; greatest depth of bill, 

 0.50; tarsus, 2.20; middle toe, 1.65. 



This species is very distinct from every other, except H. frazari, 

 Brewster,^ from Lower California, which is so closely related that even- 

 tually, when a larger series has been compared, it may prove to be no^ 

 separable. Apart from this relationship, H. galapagensis is allied both 

 to II. jx^iUifttus and H. leucopiis, but more closely to the former, as the 

 following synoptical table, which gives the chief diagnostic characters 

 of all the known American white-bellied Hwmatopi, will show: 



'The fresh colors of the nnfeathered parts in two adults obtained by Dr. William 

 H. Joues, U. S. 'N., oq Chatham Island, August 16, 1884, as noted by him, were as 

 follows: 



No. 101319, U.S.N.M. (collector's No. 64), adult, type of the species: Bill red; iris 

 golden yellow; eyelids red; feet pale flesh color. Length (before skinning), 18 

 inches; extent. 32. 



No. 101321, U.S.N.M (collector's No. 63), adult: Rill dark red; iris bright golden 

 yellow; eyelids bright red; feet pale flesh color. Length, 17^; extent, ?>'2h 



Mr. C. F. Adams's notes on specimens collected by himself and Dr. Baur. on Hood 

 and Alhemiirle islands, July 5-30, 1891, are as follows: 



Adult male: "Basal half of bill vermilion, other portion nearly as dark as maroon; 

 legs and feet lighter than bufl-pink." 



Adult female : "Eyelids red; legs lighter than cream-butf; base of bill Chinese 

 orange, anterior jiart bay." 



^ Ram ai opus fro zari, Brewster, The Auk, V, January, 1888, p. 85 (Carmen Island, 

 Gulf of California; collection of William Brewster). 



