﻿44 LÉPIDOPTÈROLOGIE COMPARÉE 



of each, to be able to compare them in precisely the same aspect. 

 Most of the photographs show the asdeagus in profile, when there 

 is a slight bulbousnous seen just above the base, and below it 

 the small remaining portion is narrowed and often paler, but the 

 aspect is différent when the view is dorsal (or ventral) for then 

 the base beyond the position of the bulb (which is not then very 

 distinct) spreads like an umbrella or lamp-shade, as may be seen 

 in the photograph of Alpina (Pyrénées) (Fig. i), in which 

 example tliis spread portion happens to be unusually dark, 

 another spécimen of the same race, with the view in profile and 

 no extra pigment présent looks just like ordinary examples from 

 Switzerland and elsewhere. 



The latéral dorsal processes, beyond the falces are slightly, but 

 distinct ly longer and narrower in Aegiis than in Argus. 



The Asiatic and American forms seem to be distinct from 

 Aegiis, to an extent sufficient to make them distinctive spécifie 

 forms. 



Melissa is distinguished by the straight portion of the falces 

 being very long and very slender. 



The Japanese forms hâve falces more like those of Aegus, as 

 hâve spécimens from the Amoor (both hill and valley) but hâve 

 the toothed end of the clasp much wider. 



Curiously enough a spécimen from Sarepta has the long dorsal 

 processes and long slender falces of Melissa, but the broad 

 harpe of the Japanese form {Mïcr argus'). 



Aster (Labrador) does not differ to a spécifie extent from 

 Melissa. 



It may be désirable to say a word or two as to the variation 

 in the appendages of Argus. The falces vary in thickness, for 

 example a spécimen from Pontresina (Fig. 6) has them very 

 slender, in other spécimens from the same locality they are of 

 the usual thickness. The v/idth of the dorsal armature varies, 

 as pressed flat in my préparations, for instance as so measured 

 the width varies from 0.53 mm. (in a spécimen of var. Bellieri) 

 through 0.56 (spécimen from Digne and Guethary) to 0.63 (Swiss, 



