124 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
This remarkable species is named for Professor Alexander Agassiz, who was 
in charge of the work of the “ Albatross” at the time Cocos Island was visited. 
Nesotriccus, gen. nov.! 
Allied to Eribates of the Galapagos Islands, but with bill relatively onger 
and more flattened. Culmen separating the nostrils as a prominent ridge. 
Gonys less than half the length of lower mandible, terminating in advanee of 
nostrils. Tail relatively shorter. 
Tyre Nesotriccus Rıdgwayi, sp. nov. 
Distinguished from the allied Eribates magnirostris in. 
Specific characters. 
feathers, and no ashiness of 
having no trace of rufous on inner webs of tail 
throat and breast. It is also smaller, with nostrils separated by a sharp ridge. 
Tab. Cocos Island. 
Adult male (Type No. 131691, Yocos Isl, Feb. 28, 1891, C. H. T.). 
Above olive, brightening to olive-buff on rump ; tips of middle and greater 
wing coverts creamy buff; wings and tail dusky, with narrow olive-buff 
edgings. Below olive, suffused with yellow, brighter on belly and under wing 
and tail coverts, darker on breast and sides of head and neck : throat pale buff. 
Bill dark brown, with posterior half of lower mandible pale yellow. Legs and. 
feet dark brown. Length (skin), 5.25 in.; wing, 2.40; tail, 2.20; culmen, 
‚55; gonys, .35 ; bill from rictus, .805 depth at base, .18 ; tarsus, .80; middle 
toe, .45. 
Only one specimen of this bird was obtained, and to the best of my recollec- 
tion only two or three others seen. They were observed among the tree-ferns 
in a deep ravine at Chatham Bay. The species is named for Mr, Robert Ridg- 
way, Curator of Birds in the U. S, National Museum. 
Coccyzus ferrugineus, GouLD. (Nesococcyx, Cab.) 
Coccyzus ferrugineus, Gould, Proc. Zoól. Soc., 1843, p. 104. Zool Voy. Sulph., 
Birds, I. p. 46. 
Only two specimens of this bird were obtained, and. not more than three or 
four others seen. As in the case of the warbler (Dendroica) its relationships 
st Indies, rather than with the forms of the 
are with species inhabiting the We 
Islands until the 
mainland. The genus was not known to the Galapagos | 
1888, when two specimens of Coccyzus melano- 
voyage of the “ Albatross,” in 
secured on Chatham and Charles 
coryphus Vieill., a mainland form, were 
Islands. 
1 yhoos = island; Triccus = a genus of tyrant flycatchers. 
