XXV. 



present it in a more complete form, while some few species, 

 then considered unprocurable, have come to hand, and 

 enabled me to fill up most of the remaining gaps. 



In the previous volumes the genitalia were drawn to 

 scale, a fact which had in some respects a certain advantage; 

 but it had also the disadvantage of reducing the figures of 

 the smaller species so greatly as to destroy their value. 

 After carefully weighing the pros and cons, we decided to 

 keep the drawings fairly uniform in size, in order that the 

 different and characteristic points, in even the smallest 

 species, might be shown. 



I have found the " Tortrix men " so generous in 

 helping with specimens, many in cases of difficulty sending 

 their entire series to " do as I liked with," that I have 

 added the names of the donors to the species, so kindly 

 provided by them, and I wish this to be a record of my 

 grateful thanks. 



The ever difficult question of the Nomenclature has 

 been considered, although from the point of view of my 

 particular study, the question of names is really a matter 

 of no great importance. The generic names have been 

 worked out with the aid of Mr. C. H. Fernald's "The 

 Genera of the Tortricidno and their types." Where we have 

 been unable to find any existing generic name, we have left 

 a blank space, and the same with regard to the type. So 

 many genera have been created for foreign species, that, 

 until these have been examined from a genitalic point of 

 view, we have been averse to providing superfluous names 

 for genera which may already exist. These blanks may 

 be filled in as our knowledge increases. For the specific 

 names I have relied mainly on the type collection in the 

 Victoria Museum at Manchester, named by Mr. J. H. 

 Durrant, and to him I am indebted for much help in this, 

 and other matters. 



I believe the compilation we have arrived at to be 



