NIDIFICATION AND INCUBATION 



341 



De Beaugue and Bishop Leslie write in the same strain. 

 However, the Rev. H. N. Bonar saw three branches of 

 ash, from eighteen to twenty-four inches in length, in 

 Gannets' nests, on July 13th.* 



QANNET ON ITS NEST. 



There seems to be no doubt that both sexes take part in 

 the task of incubation, and the Rev. N. Mackenzie agrees 

 with Martin in thinking that the old birds sit by turns. f 



* Here it may be mentioned that Mr.W. E\'ans found the Common Earwig, 

 and a brachelytrous beetle (Philonthus ceneils), plentiful in Gannets' nests 

 on the Bass in August. 



t " Annals Scot. Nat. Hist.," 1905, p. 144. 



