'Tesg. 1 '] PROCEEDINGS OF THE NATIONAL MUSEUM. 103 



not before been mentioned. I am unable to distinguish the young in 

 first plumage from that of N. melanotis. The specimen described by 

 Mr. Sharpe in P. Z. S., 1877, p. 05, is undoubtedly a young bird, the 

 adult having no spots on the breast. 



3. Nesomimus macdonaldi sp. nor. 

 Sp. Char. — Similar to N. trifasciatus (Gould), but much grayer above, 

 much more black on side of head, the bill much longer, and the tarsi 

 much shorter. 



/ 



Fig. 1. — Nesomimus macdonaldi. 



Hab. — Hood Island, Galapagos. 



Adult male (type, No. 116066, Hood Island, Galapagos, April 7, 1>88: 

 U. S. S. Albatross): Above brownish gray, more ashy anteriorly and on 

 lesser wing coverts, becoming decidedly brown on rump, each feather 

 with a central or mesial space of dusky, these 1 markings largest on back 

 and scapulars, nearly obsolete on lower back and hind-neck ; wings (ex- 

 cept lesser coverts) dull black, the posterior row of lesser coverts, middle 

 coverts, and greater coverts, broadly margined at tips with white, form- 

 ing three bands across the wing; greater coverts and tertials broadly 

 edged with drab or grayish brown, the latter margined terminally with 

 white; primaries and their coverts narrowly edged with pale brownish 

 gray or dull whitish; tail blackish dusky, the outer feather with an ill- 

 defined pale brownish-gray space near tip of inner web, uexttoedge, the 

 second with a mere edgiug of the same color in corresponding position. 

 A narrow and poorly defined superciliary stripe of white, bordered be- 

 neath by a blackish stripe covering lores, extendiug beneath eye, and 

 thence along upper edge of auricular region, the rest of the latter dull 

 light gray mixed with black, especially on lower posterior portion; a 

 broad white malar stripe, bordered beneath by a narrow interrupted 

 stripe of dusky along each side of throat. Under parts white, tinged 

 with pale drab across chest, where sparsely spotted with brownish 

 dusky; upper part of breast immaeulat", forming a rather distinct broad 

 band or belt, this succeeded by broad lateral patches (nearly or quite 

 meeting on middle of breast) where th& feathers are faintly tinged with 

 brownish-gray and marked with large central, more or less U-shaped 

 spots of dusky; sides and flanks broadly streaked with dusky. Bill 

 black, slightly brownish on basal portion of lower mandible: legs and 

 feet brownish- black. Leugth (skin), 10.50; wing, 4,90; tail, 4.80; (mid- 

 dle feathers not grown out) ; exposed culmen, 1.25; bill to rictus, 1.60; 

 tarsus, 1.50; middle toe, ,90. 



