PRELIMINAEY PREFACE TO PART I. 



In issuing the first portion of a Catalogue of the Lepidoptera of 

 Northumberland, Durham, and ^^Tewcastle-upon-Tyne, a few 

 preliminary remarks appear desirable, though the introduction 

 proper will not appear until the completion of the work. 



The form of the Catalogue is in accordance with that com- 

 menced in 1858 by the late George Wailes, but in the arrange- 

 ment of species, and in the nomenclature adopted, the important 

 work on the Lepidoptera of the British Isles, by C. Gr. Barrett, 

 Esq., r.E.S., has been followed. The references to the sixth 

 volume of that work, which is not yet published, have most 

 kindly been supplied by Mr. Barrett. The remainder will be 

 given with the next Part and can then be filled in. References 

 are also given to Stainton's Manual, Meyrick's Handbook, and 

 to J^ewman's popular work, these appearing to be the books 

 most used by Lepidopterists of the day. 



Following Mr. Barrett's arrangement the next group will be 

 the Geometrina, but as I am already beyond that portion of his 

 work which has appeared, I can no longer follow him in detail, 

 and after due consideration and to avoid delay, the well-known 

 Manual of the late H. T. Stanton will be followed for this large 

 group. 



Most of the local collectors, applied to, have freely supplied 

 lists and details of their captures. To this, however, there are 

 one or two marked exceptions. A full acknowledgment of all 

 assistance rendered will be given in the introduction, and is 

 recorded under the different species, and I shall be glad to 

 receive additional lists from any local collector. 



The next portion for the printer will be the Geometers, lists 

 of which should reach me as early as possible. All additional 

 information in the groups now completed will be given in an 



