416 Mr. G. A. K. Marshall on 



under-side becomes of a general brownish tint, mure or 

 less resembling a withered leaf, the likeness being 

 heightened by an oblicjue line running from the apex of 

 fore-wing to the anal angle of hind-wing, re))resenting the 

 mid-rib ; also by the marked prolongation of the fore-wing, 

 so well known in the winter form of Mclanitis leda. 

 Lastly, the ocelli on the under-side are much reduced or 

 obsolescent" (Trans. Ent. Soc. Lend., 1896, p. 557). I 

 am unable to understand the opening statement that 

 " the dry-season form is smaller," indeed, Mr. Mar.shall 

 criticizes a more general statement of the same kind made 

 by Mr. C N. Barker (loc rit. p. 551). In the very first 

 species described from this point of view by Mr. Marshall, 

 Precis hcgela, he speaks of " the smaller summer form," 

 and the only other Precis in which he speaks of a differ- 

 ence in size is P. artaxict, of which he uses almost the 

 same words (p. 561). I have since compared the two 

 phases of the following species in the Hope Collection, with 

 results shown below: — 



Precis ittgela, dry phase larger. 



„ ccri/ne, „ „ much larger. 



actia, ,, ,, „ „ 



„ pelasgis, ,, ,, rather „ 



„ sesamns, „ „ distinctly larger.* 



„ antilope, „ „ much „ 



„ artaxia, „ ,, „ „ 



See also pages 451 and 456 for the proof by weighing of 

 the great difference between some of these phases. 



Since the above paragraph was written Mr. Marshall 

 has informed me that the statement was certainly a slip 

 of the pen, which remained uncorrected, because he was 

 unfortunately unable to see the proofs of his paper. 



Although Mr. Marshall anticipated the results of future 

 discovery in a truly remarkable manner in this memoir 

 (Trans. Ent. Soc. Lond., 1.S96, p. 557), and brought forward 

 evidence of a most convincing kind, yet the conclusion 

 which required to be proved was to most naturalists so 

 highly improbable, because of the e.xtraordinary differences 

 between the supposed species, that nothing less than the 

 actual breeding of one form from another was sufficient. 



In his second paper on the subject (Ann. and Mag. Nat. 



* Difference nuicli les.s marked in specimens from northern part 

 of range. 



