( xxiv ) 



palings, etc.) and all gave out an odour weaker than, but of 

 the same character as, that emitted by the perfect insects. 



With respect to the term " homoeochromatism," it had this 

 disadvantage, that it was at once too wide and too restricted — 

 too wide, because it did not exclude cases of resemblance due 

 to mere relationship, and too restricted, because it left out of 

 sight the similarity in shape of wings or body, or of move- 

 ment and habit which often made up part of a mimetic 

 likeness. 



He did not agree w^ith Mr. Rothschild as to the case of 

 Papilio merope, considering that cases in which the $ alone 

 was exactly modified in imitation of a protected form (or, as 

 in the instance under notice, of three or four differing 

 protected forms) were, by reason of the extraordinary contrast 

 with the unmodified (^ , more striking and unmistakable 

 instances of obvious and indisputable mimicry than even 

 those in which both sexes were similarly modified. As 

 regards the Abyssinian representative of P. merope named 

 P. antinorii, which until recently was thought like the 

 Madagascar and Comoro representatives (P. meriones and P. 

 humhloti) to have the sexes alike, without any mimetic 

 modification of the $ , Prof. Kheil had described and figured 

 in 1890 two forms of the $ (collected, with seven $ S and 

 two $ $ coloured like the S , at Lake Tana by the late Dr. A. 

 Stecker) respectively closely imitative of D. chrysippus and 

 Amauris niavius, but still retaining the conspicuous tails 

 on the hindwings which all the other known forms of $ 

 of the allied species on the African continent have lost. 

 There, it seemed to him, was a most interesting and con- 

 clusive case of mimetic modification still actually in progress, 

 the $ usually resembling the S in both colouring and 

 pattern as well as in outline of wings, but also presenting 

 two other forms, each profoundly modified in simulation of 

 a protected Danaine butterfly, yet an incomplete mimicker 

 in so far that the tailed outline of the hindwings remained 

 unaltered. 



He must admit that the capture by birds of butterflies was 

 rare, but he had himself seen birds, especially the Drongo 

 shrike, chasing butterflies. 



