786 Recently published Ornithological Works. 



Black Grouse, and Bustard are all extinct as breeding-birds 

 "within the county. 



We notice with pleasure that a more comprehensive work 

 on the birds of this county is being prepared by Mr. Caton 

 Haigh, and we hope before long to have the pleasure of 

 seeing it published. In the meantime Mr. Blathwayt's 

 list will doubtless be of much value to all interested in the 

 avifauna of Lincolnshire. 



Burns on the Length of the Incubation-period in Birds. 



[Comparative Periods of Deposition and Incubation of some Nortli 

 American Birds, By Franli L. Burns. Wilson Bulletin, Chicago, 111., 

 1915, pp. 275-286.] 



The information contained in this paper has been collected 

 from various sources, both published and unpublished. A list 

 of the genera in which either the male only or the female only 

 or both sexes perform the duties of incubation is first given. 

 In the case of North American birds only the Phalaropes 

 and the Spoon-billed Sandpiper (^Eurynorhynchus pygmaus) 

 appear to fall in the first category. The period of deposition 

 does not seem to be governed by any very definite law, 

 though the size of the egg in relation to that of the bird 

 may have something to do with it, as in the case of a larger 

 egg a bird may require some time to recuperate. The 

 interval seems longest in the case of the Condor, which only 

 laj^s two eggs, and in which the interval between the two 

 layings amounts to a week or ten days. Finally, a system- 

 atic list of the period of incubation is given for all those 

 birds on the North American list about which there is any 

 direct evidence. 



Buturlin on Russian and Eastern Palcearctic Birds. 



\_IIa-inatopus ostralegiis longipes, subsp. nov. By S. A. Buturlin. Mess- 

 ager Ornith., Moscow, i. 1910, pp. 36-37. 



Laiscopus collaris kwenlutiensis, subsp. nov. Id. ibid., pp. 188-9. 



Coracias garrulus caucasicus, nov. subsp. Id. ibid., pp. 190-2. 



Parus cinereus ferghanensis Buturlin. Id. ibid., iii. 1912, pp. 16.3-4. 



Corvus macrorhynchus mandslniricus, subsp. nov. Id. ibid., iv. 1913, 

 p. 40. 



Names of the Parus cinereus group. Id. ibid., p. 51. 



Notes on Distribution oi Ptnthestc.s ( = Pacile). Id. ibid., pp. 116-7. 



