﻿THE ENTOMOLOGICAL MAGAZINE 



139 



DESCRIPTION OF A NEW VARIETY OF LYCAENA ARGUS 

 L.， WITH REMARKS ON ITS SEASONAL FORMS. 



BY M. YAGI, F.E.S. JAP. 

 Ree. Oct. 14, 1915. 



When I climbed Mt. Asama (in the prov. ot Shinano) during the 

 last several years, happened to catch a few abnormal specimens ot 

 Lycaena argUS L. For the shape being larger, and especially the 

 wing coloration of the male being very blackish, they greatly aroused 

 my interest. After close investigations, I concluded this melanous 

 form to be a new variety, and named it montanus with the follow- 

 ing description. 



Lycaena argus L. 



var. montanus, n. (Fig. l.) 



Similar to the original form in 

 colour and pattern, but different in 

 the following points : 



1. Size larger, particularly in ^. 



2. Ground colour of the upper 

 side brownish black ； ^ little 

 brighter. 



3. On the primaries, scales of 

 physical bluish colour spread 

 over from the base to the 

 middle of the wings, but very 

 slightly except along the costal margin. 



4. On the secondaries, bluish scales suffused only at the central 

 area, and such black spots are invisible at the outer margin 

 (from cell II to IV) as in the original form. 



5. Underside more greyish with larger black spots ； on the 

 primaries, the outer marginal two lines of black spots, which 



N. Yagi 



Lycaena argus, 

 Var montanus x i ィ 



Form I 

 Foim II 



