( 21 ) 



" Neptis frohenia, F., from Mauritius, differs from the 

 superficially similar N. consimilis, Boisd., from the Austro- 

 Malayan islands, and agrees with saclava, Boisd., in the 

 following neurational characters : — 



" In frohenia the origin of vein 10 of the fore-wing is much 

 nearer to apex of the cell, so that its distance from that point 

 on the distal side is approximately equal to the distance of 

 vein 11 from the same point on its proximal side. In the 

 hind-wing veins 6 and 7 are very close at their origin, and 

 vein 5 has a sharp curve at its base, representing a rudimentary 

 ■discocellular. 



" In consimilis the origin of vein 10 of the fore-wing is much 

 further removed from the apex of the cell, its distance being 



saclava (Madagascar). 



almost three times as great as that between vein 11 and the 

 same point. In the hind-wing veins 6 and 7 are appreciably 

 separated at their origiii, while vein 5 is scarcely curved at the 

 base, giving the upper edge of the cell a much flatter outline, 

 xxxv] 



" In all these characters frohenia agrees closely with the 

 other yellow-marked Neptis of the African islands that I have 

 examined, viz. : N. chmietorum, Boisd., iV. inayottensis, Oberth. 

 and iV. comorarum, Oberth." 



Dr. Karl Jordan kindly consented to investigate the 

 evidence of afl^nity founded upon the male genital organs. 

 The following account prepared by him entirely supports 

 Mr. Marshall's conclusions, although I was at the time un- 



