IV. 



embody the information to hand in the section on " Times of Appear- 

 ance," and to omit the locality list altogether. I hope I was justified 

 in so doing. 



With the exception of the first page or so on the habits of the 

 perfect insect, I found myself obliged to write the whole of the account 

 of Ariria wedon, of course excepting Dr. Chapman's Life-History, but 

 I availed myself as largely as possible of direct quotation, and no 

 opinion of my own is expressed, either here or elsewhere, unless I have 

 given my name or initials at the end; ever}' other opinion expressed 

 is that of the original author ; and I am most anxious to emphasize 

 this fact, both in order that he may get all the credit; due for them, and 

 also to protect myself against having them quoted or referred to as my 

 own, which is by no means always the case. For instance, had I been 

 writing in my own name, I should never have permitted such an ex- 

 pression as Lycaenu avion ab. alcon, and should certainly have used le 

 Chamberlain's name pseudo-alcon to replace it, since there is already a 

 species of Lycaena so named. Again, I have no personal objection to 

 the expression "sub-species," though I am entirely at one with the 

 objections made to Frvihstorfer's misuse of the same. 



Much larger extracts were already written by the author in the 

 case of Lyca&na avion, though there was only one section quite complete, 

 but even in the case of this species I have had to work out and write 

 the whole section on Variation (pp. 304-328), as well as considerable 

 portions of other sections, but it was not necessary in this instance to 

 make so elaborate a mosaic of my own words and the original author's 

 as was the case with the previous species. The life-history here again 

 will be recognized as Dr. Chapman's. Most of the lists of localities, 

 variation, etc., were sent to Mr. Tutt, and have been acknowledged by 

 him, such as the elaborate list of German localities and habitats 

 supplied by Herr Gillmer, the P. icarus variation of the late Dr. 

 Hodgson, the variation of A. viedou in Switzerland of Dr. Reverdin, 

 etc., as well as short lists too numerous to mention, but the French 

 local lists sent by Mr. H. Rowland-Brown, the Chiltern variation of A. 

 medon by Mr. B. C. S. Warren, and the information from Turkey with 

 regard to /.. avion by Mr. P. P. Graves, have been supplied to me direct, 

 and I here acknowledge ray debt and record my thanks. Mr. Stanley 

 Edwards has also given much kind help in the wearisome work of 

 searching in magazines, which has saved me a great deal of time and 

 labour, though 1 have not considered myself absolved thereby from the 

 duty of checking these references, as well as those in other parts 

 of the work. Of Dr. Chapman's large share of the work it is 

 superfluous to speak. The laborious and somewhat thankless task of 

 preparing the Synopsis and Index has been carried out by Mr. H. J. 

 Turner. 



A word of explanation is necessary with regard to the numbering 

 of t lie Plates, since ot herwise many subscribers would naturally suppose 

 that some had been lost. This is not the case. P,lates iii., xii., xx. 

 and wi\. simply do not exist. What Plate iii. was to have represented 

 I have no idea ; Plate xiii. was also published before the numbering of 

 tin' plates came into my hands, but 1 have 1 no doubt that Mr. Tutt 

 intended to have two plates of the imago of /'. icarus, for which how- 

 ever there was not sufficient material forthcoming; bence Plate \i. is 

 Id lowed by Plate xiii. The other Plates I was obliged to number 



