ACTIAS MAENAS, VAR. ISIS. 



139 



colour transition. It is also my opinion, that the lunules 

 and the ocelli are the focus of the colour-development. 

 From these centres the yellow begins to practice usury on 

 the red-brown and follows a natural line of division. This 

 line is in this genus the flexuous transverse streak, parallel 

 with the outormargin. So it is important, how the streak 

 is running. Here follow five sketches of this streak in 

 the described varieties. 



1. Streak on forewing of J. maenas 9, fig. by Westwood. 



2. Streak on forewing of A. maenas, Doubl. 9 and of A. maenas, Var. 



saja 9. 



3. Streak on the underside of Var. saja ?. 



4. Streak on the forewiog of A. maenas, Doubl. r/ and of A. maenas, 



Var. saja J. 



5. Streak on forewing of Var. laiona, Fruhst. c/ and of isis, Sonth. ,/. 



I finish suggesting that naturalists will pay more at- 

 tention to this Saturnid^ which will be a very good object 

 for rearing experiments. It is a pitty that it is so difficult 

 to have these moths brought over. 



Leyden Museum, Jan. 8, 1913. 



Notes from the Leyden IMuseum, Vol. XXXV. 



