508 Recently published Ornithological Worhs. 



generally available system for the whole of Russia (European 

 and Asiatic). The author's chief object is to encourage bird- 

 hunters in all parts of Russia, and especially in the Asiatic 

 provinces, to cultivate Ornithology. He disclaims complete- 

 ness for the present work, and refers the reader for more 

 detailed information to Prof. Menzbier's book ' The Birds of 

 (European) Russia/ and to the ' Birds of Europe,' by 

 Holodkofsky & Lifantief, in course of publication in parts. 

 The system adopted in these tables is to co-ordinate the 

 distinguishing characters of two types of each variety or 

 species, leaving the collector or observer to classify his 

 specimens according as these assimilate to one or the other 

 type. Intermediate specimens are of great interest from 

 various aspects, such as geographical distribution, paheon- 

 tology^ and the origin of species. To these must be added 

 differences due to hybridization (very common among the 

 Gal/inacea), influence of climate, sex, age, and season. 

 With these last the tables are not concerned. As a hand- 

 book for the Russian sportsman and collector in remote 

 parts of tlie Empire, where books are difficult of access, 

 M. Boutourline's tables will probably be found useful. 



81. Clarke on the Migration of Birds. 



[Bird Migration iu Great Britain and Ireland. Fourth Interim Eeport 

 of the Committee cousistinii' of Prof. Newton (Chairman), Rev. E. P. 

 Kuubley (Secretary), 3Ir. John A. Ilarvie-Brown, Mr. 11. M. Barrington, 

 and Mr. A. H. Evans, appointed to work out the details of the Observa- 

 tions of Migration of Birds at Lighthouses and Lightships, 1880-87. 

 Rep. Brit. Assoc. Glasgow, 1901.] 



This Report contains an account of the migrations of the 

 Skylark [Alauda arvensis) and of the Swallow {Hirundo 

 rustica), worked out similarly to those of former species (see 

 'Ibis,' 1901, p. 325) by Mr. W. E. Clarke with his usual 

 accuracy and comprehensive grasp of the subject. A serious 

 deficiency of data is noted with regard to the South Coast 

 of England, but the subsequent visit oi Mr. Clarke to the 

 Eddystone Lighthouse {' Ibis/ 1902, p. 216) has resulted in 

 the acquisition of much further information. 



