G9() Recently puhUshed Ornithological Works. 



critical remarks on the collection are givcti^ but the field- 

 notes are reserved for a separate report. The Passeres of 

 this far-northern spot are 10 in number, amongst which is a 

 Tyrant {Confojms richanhoni) not previously observed so 

 far north. 



132. Stone on the Summer -moult of Ducks. 



[The Summer Molting [sic] Plumage of certain Ducks. By Witnier 

 Slone. Proc. Nat. Sci. Philad. 1899, p. 467.] 



After studying the series of Eider-Ducks obtained by 

 Mr. Mcllhenny at Point Barrow, Alaska (see above, p. 689), 

 Mr. Stone has come to the conclusion that the " summer- 

 plumage '•* assumed by these and other ducks is, in no sense, 

 a ''nuptial plumage," as "it does not appear until the 

 mating season is over," and is ''distinctly a post-nuptial 

 dress,^' mainly restricted to the head, neck, breast, and 

 scapulars : Mr. Stone is of opinion that its use is to render 

 the bird inconspicuous during the time when it is moulting 

 its flight -feathers and is unable to fly. He proposes to call 

 it the " summer-moulting plumage." 



133. Van Denburgh on Calijornian Birds. 



[Notes on some Birds of Santa Clara County, California. By John van 

 Denburgh. Proc. Amer. PLil. Soc. xxxviii. p. 157.] 



This is a local list, accompanied by field-notes, of the 

 birds of Santa Clara County, California, based on casual 

 observations extending over fourteen years. The Humming- 

 birds here are Calypte anna and Selusphorus rvfus, both of 

 them resident and breeding. 



134. Van Kem.pen on his Collection of Varieties and 

 Hybrids. 



[Sur une S^iie de Mammifercs et d'Oiseaux presentant des vari^tes de 

 Coloration, desCas d'llybridite et des Anomalies. Par Ch. van Kempen. 

 Bull. Soc. Zool. France," 1899, p. 213.] 



Since 1897, when a former list was published, M. Van 

 Kempen has added considerably to his collection of colour- 

 varieties and hvbrids in the classes of Mammals and Birds. 



