860 



parison with the male and with allied species gives the impression, 

 that the proximal pattern, consisting of dark spots on a light ground, 

 has been driven back in the direction of the wing-root by the 

 distal one, which shows the wellknown type of the filling up of 

 the internervnral cells by dark pigment with a light median streak. 

 (Also DE Meyerk uses the term supplanting to this case). For a 

 comparison of (he stages of this phenomenon 1 point to the series 

 reniigera, aubfascia, cariae, producta, septentrionalis among others 

 (Seitz. Vol. X, T. 27). 



Ultiniately the proximal pattern must totally give way to the 

 distal one {butleri, pi'O.viiiKï, eugenia, fuscipennis, bkaionua, papuaiia). 

 In one single case however {octrealis) the proximal pattern extends 

 over the greater part of the forewing, the distal one only leaving 

 traces of its presence along the outer margin. 



The hindvving shows a greater tendency to lose all traces or 

 nearly so of the distal pattern, its colour design thereby being 

 restricted to the usual dark spots, arranged in concentric transverse 

 arches in different numbers, on a light back ground. 



Groningen, November 1917. 



