THE BIRDS OF YORKSHIRE. 



The previous instalments have appeared as follows: 



Sheet i in Trans. Y.N.U., part i, 1877, published 1878. 

 Sheets 2 and 3 in Trans., part 3, 1878, published 1880. 

 Sheet 4 in Trans., part 4, 1879, published 1882. 

 Sheet 5 in Trans., part 9, 1884, published INIarch, 1886. 



The present instalment includes the work of both authors, and for the sake of 

 accuracy it may here be stated that the articles oh Aicentor viodularis, A. collaris, 

 and Erithaais rubcctila were originally written by Mr. W. Eagle Clarke in 18S7, and 

 have been added to and brought down to date by Mr, Nelson. The article on Daulias 

 litscinia is also printed as originally written in that year by Mr. Clarke, with Mr. 

 Nelson's additions to bring the record down to date, the respective authors' para- 

 graphs being in this case distinguished by their initials. The articles on Cyaiieciila 

 leucocyana and C. siiecica are by Mr. Nelson, by whom future instalments of Ihis 

 work^will be written. — IvD. Traxs. "i'.N.U. 



