°i9i4 J Murphy, A New Petrel. 13 



Sciences, a stop of one day was made at Trinidad Islet in the south 

 tropical Atlantic. Among the birds collected by the writer on 

 that occasion is a single specimen of an Mstrelata which is new to 

 science. 



The new species belongs to that division of the genus character- 

 ized by an exposed white area on the under side of the outer pri- 

 mary, and in its measurements it approximates its three congeners, 

 M. arminjoniana Gigl. and Salvad., /E. wilsoni Sharpe, and jE. 

 trinitatis Gigl. and Salvad., which likewise are known only from 

 the vicinity of the same remarkable islet. In plumage, however, 

 it resembles no other JEstrelata, its white mantle, flecked with spots 

 like ermine-tails, making it at once the most distinctive and most 

 beautiful of its kind. Further notes on the affinities of the species 

 will be presented in a forthcoming paper. I propose to name it 



^strelata chionophara^ sp. no v. 



Type in American Museum of Natural History, R. C. M. No. 1982, 

 adult 9, Trinidad Islet, lat. 20° 30' S., long. 29° 22' W., April 8, 1913.— 

 Pileum, sides of head, wings, rump, upper tail-coverts, and tail blackish- 

 brown, the concealed portions of all the feathers white; a few interspersed 

 white filoplumes on occiput; mental apex, lores, cheeks, fore part of cervix 

 and sides of neck mottled blackish-brown and white; hinder cervix and 

 interscapulum white, the feathers with dark shafts, faint anteriorly, which 

 expand to form conspicuous rhomboidal speckles on the middle and lower 

 back; scapulars white with dark shaft streaks, the exposed portion of 

 outermost dark; under surface except chin white, the under tail-coverts 

 broadly tipped with blackish-brown ; under wing-coverts white, a few dark 

 shafts and mottlings toward margin of wing; axillaries white with dark 

 shafts, two of them on either side broadly edged on one web with blackish- 

 brown; sides marked slightly with dark feather shafts; feathers of lower 

 flanks tipped with blackish-brown chiefly on their outer vanes. Bill (in 

 life) bright flesh color flecked with black, the unguis chiefly black; iris 

 brown; feet and legs (in life) pale flesh color with a few black freckles on 

 webs. Length (skin) 376 mm., wing 285, tail, central rectrices 115, lateral 

 rectrices 81, culmen 30, tarsus 33, middle toe with claw 51. 



1 From Xioveio^ = snowy, and iapo% = a mantle. 



