582 Recently published Oniilhological Works. [Ibis, 



principles are discussed and applied, and lead Mr. Grinnell 

 to the conclusion of the enormous importance of the struggle 

 for existence among birds — a factor iu evolution much 

 sneered at by some of our modern writers. 



The last item is a little popular sketch of tlie bird-life of 

 the beautiful Yosemite National Park, one of the glories 

 of California and visited by increasing numbers of tourists 

 and travellers every year. 



Grate's translations of Russia?! Memoirs. 



[Aus der ornitliologisclieu Litteratur Russlands. Bericlite uiid 

 IJbersetzungen. Von liermauu Grote. Nos. iii,, iv., 1921, 1922.] 



We have two more numbers of the useful translations of 

 Russian papers prepared by Dr. Grote. The first of these 

 contains an essay on the Avifauna of the Government of 

 Tobolsk in western Siberia, based on the papers published 

 by T. Slowzow, M. Russki, and K. Derjugin between 1892 and 

 1897, and more recently by W. Uschakov; also another 

 list of the birds of part of the Wologda Government in 

 north-eastern Russia, besides a paper by W. Andrejew and 

 V. Bianchi published in 1910, to which is attached a de- 

 scription of a new race of Sparrow-Hawk [Accipiter nisus 

 peregrinoides) by Otto Kleinschmidt, based on a bird obtained 

 at Rositten, but supposed to be a wanderer from western 

 Siberia. 



The fourth number is specially dedicated to Prof. Schalow 

 on his 70th birthday, and deals with the researches of 

 N. Sarudny on the birds of the Kisyl-kum desert, a desolate 

 district lying to the east of the sea of Aral, and south of the 

 Syr-Darjaand the Amu-Darja rivers. It contains a number 

 of interesting observations on the birds of that region not 

 before available to western ornithologists. 



Hartert's Paiaarctic Avifauna. 



[Die Vogel der palaarktischeii Fauna. Von Dr. Erust Ilartert. 

 Heft, xviii.-xix. (Bd. iii. 4-5) pp. 2149-2328 & i-xii. Berlin (Fried- 

 lander), March 1922. 8vo.] 



With this number Dr. Hartert ends his long labours, 



