﻿THE ENTOMOLOGICAL MAGAZINE, Vol. 111. I> にに 



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deals with the data concerning the spots of the interspace I of the hind 

 wings as well as in the females of Table III, Thus the spring genera- 

 tion has more commonly the adventitious spots on the upper surface of 

 the hind wings than the summer generations. The distinction between 

 the sexes is no less remarkable : the spots in the interspaces V and VI 

 are far more common in the females than in the males. This is also the 

 case with the spots of the interspace I. These conditions are readily per- 

 ceptible wlien one compares the sexes of every lot in Tables III and IV. 



As to the relative frequencies of the spots other than those of the 

 interspaces mentioned above, the data are shown in Table V. We are 

 unable to find out any definite relation between tlie frequencies of such 

 spots and sexes or generations. The scantiness of cases may be among- 

 the causes However, a kind of the "local variation is met with when 

 one compares Lots I, II, V, VI with Lots X, XI, in respect to the spots 

 of the interspace II of the fore wing : 一 the individuals of Tondabayashi 

 are more frequently ornamented with the spot in this interspace than 

 those of Kawanabe. 



Among the spots shown in Table V, one of tlie most commonly 

 formed is;); the interspace IV of the hind wing, the relative frequencies 

 amouiic 1、 to some 5.6 (males) or 6 5 (females) percent on the under 

 surface and 2.8 (males) or 5.7 (females) percent on the upper surface. 

 It is to be remarked that presence or absence of this spot on the under 

 surface is the criterion by which var. argUS is distiiigaiished from the 

 original form. As the percentage of presence is thus small, the variety 

 might well be called lairly well established. Next, in the order of frequ- 

 ency, comes the spot of the interspace II of the fore wing, to which 

 mentions have already been made. 1 lie spots most rarely met with are 

 those of the interspaces I and VI of the fore wing, as well as of the inter- 

 space lb of the hind wing. 



Adventitious spots usually develop symmetrically on both wings ； and 

 the corresponding spots on both wings aie the same both in size and in 

 constitution. The number of the individuals with an adventitious spot 

 only oil a single side hardly amounts to 10 percent of the number of 

 those furnished with the same spot on both sides, provided that the total 

 number taken into account is fairly large. 



