dori, also from the coast of Lower California; but the latter appears to be a 

 different species, as will be discussed furtlier on. It comes nearest to brachyp- 

 terus, from Unalasclika ; in fact there is nothing in Brandt's brief diagnosis 

 preventing the reference of the present species to braclujpterus, except 

 the expression "tarsi digito medio longiores." But in view of this 

 discrepancy, and of the widely-separated localities whence the two species 

 are described, it would be unsafe to take their identity for granted. It is much 

 the best course to retain the present species as it stands, under the name 

 hopoleucus, which has the merit of being positively identified, as is not the 

 case, as yet, with brachi/pterus. 



Several excellent examples of this species from various points along the 

 coast of California are in the collections of the Smithsonian Institution and 

 Philadelphia Academy. They present no individual differences worthy of 

 special mention ; except in the instance of the type specimen, which is 

 brownish above, from the faded and worn condition of the plumage. 



This species has probably the southernmost range of any of the family ; 

 occurring in summer at Cape St. Lucas. It was observed by the writer in 

 December, 1865, off the coast of Mexico, about latitude 21° N. ! Its extension 

 northward remains to be ascertained. At present, it is not known to occur 

 north of the coast of Lower California. Its southern habitat, as remarked by 

 Prof. Baird, is a fact of great interest, when it is recollected how truly boreal 

 are nearly all the species of the family. 



Brachyrhamphps Craveri, [Salvad.) Coues. 

 Uria Craveri, Salvadori, Descrizione di altre Nuove specie di Uccelli esistenti 



nel museo di Torino, 1867, p. 17. Estratto dagli Atti della Societa Italiana 



di Scienze Naturali, vol. viii, 1866. 



" Jun. — Uria minima, crassitie Merguli alle ; supra fusco-nigra, dorso ac alls 

 nonnihil griseo-tinctis. Subtus alba ; rostro valde elongato, subulato, nigro ; 

 tarsis postice nigris, antice viride-luteis ; unguibus nigris. 



" Long. tot. 0,245 ; al. 0,125 ; caud. 0,018 ; rostri a rictu 0,037 ; tarsi 0,022 ; 

 dig. med. cum ungue 0,024 ; (millimetres.) 



" Parti superiori, lati della testa, le piume del mento lungo il margine 

 inferiore della mandibula, lati del collo, del petto, e fianchi di color bruno- 

 nero con una leggera tinta grigio-lavagna sul dorso, sul groppone e sulle ali ; 

 parti inferiori candide ; becco nero ; tarsi neri posteriormente, anteriormente 

 giallo verdastri como auche le dita ; unghie nere. 



" Questa specie sarebbe commune lungo le coste del Golfo della California, 

 e ncir Isola della Natividad posta nel Pacifico, a poca distanza dalla costa 

 occideutale della Bassa California." — Salvadori, 1. c. 



This recently described species has much the same habitat as B. hypoleucus, 

 and very much resembles the latter. The dimensions are the same in both, 

 and the colors are very nearly alike. The expression " fusco-nigra, * * 

 griseo-tinctis," exactly hits some specimens of hypoleucus, — those somewhat 

 faded and worn in plumage, — though not applicable to more perfect specimens. 

 In the above copied description, no mention is made of the under surfaces of 

 the wings ; but the needed information in this regard has been supplied 

 through a private channel. Prof. Baird has received from Sig. Salvadori, and 

 kindly transmitted to the writer, a life-size figure of the bird, accompanied by 

 a note in which it is stated that " the lining of the wings is blackish, and some 

 feathers are white-edged." This fact at once distinguishes the species from 

 hypoleucus, providing the latter, in all stages of plumage, has the under sur- 

 faces of the wings white, as is most probable, judging by what is known of 

 the variations in plumage of the birds of this genus. 



Waiving tiie bare possibility of this bird s being a young hypoleucus, it cannot 

 be referred to any described species, and must be regarded as a valid one. 

 Thiil il Is noi brevirostris, Vigors, is sutiiciently evident from the dimensions; 

 the tarsus of the latter being oulv half an inch long. 



