( xxxvii ) 



that the resemblance was synaposematic. In either case the 

 difference between the seasonal phases with respect to their 

 approach to the distasteful model was undoubtedly significant, 

 and he thought it would not be easy to find an explanation 

 better fitting the facts than that just offered. 



Mr. Edward Meyrick, B.A., F.R.S., contributed a paper 

 ' On the Genus luwia, "Walk. ( = Tortricomorpha, Feld.)." 



Mr. H. Eltringham, M.A., F.Z.S., contribvited the following 

 paper on "The Late Professor Packard's Paper on the Mark- 

 ings of Organisms.'' In the absence of the author, Professor 

 E. B. PouLTON, F.E.8., explained the drift of the paper, and 

 expressed his agreement with the main lines of argument : — - 



The late Professor A. T. Packard read a paper before the 

 American Philosophical Society on December 2nd, 1904, in 

 which he criticised at some length the Bates- Miiller hypothesis 

 of mimicry. The paper is the more welcome owing to the 

 comparative scarcity of literature dealing with the subject 

 from an antagonistic point of view. Since the promulgation 

 of the presently accepted theories of mimicry and protective 

 resemblance the subject has made vex-y considerable progress- 

 Whilst, however, the strongest supporters of the Bates- 

 Miiller theories have lost no opportunity of publishing facts 

 corroborati\e of the general principles which they uphold, 

 the opponents of these views have for the most part contented 

 themselves with a kind of passive disagreement, usually 

 treating the whole subject with a species of airy contempt, 

 sometimes putting forward somewhat vaguely formulated ob- 

 jections, but in no case, so far as I have been able to ascertain, 

 bringing forward any really satisfactory hypothesis on which 

 to base an explanation of those phenomena for which the 

 Bates-Mliller theories seek to account. Nor does the paper in 

 question remove this latter defect. The main conclusion is 

 that the instances of resemblance which have been noted 

 amongst organisms ai-e due, not to any tendency of an un- 

 protected species to resemble for its own benefit, a protected 

 form, but to the biological environment of the species con- 

 cerned. "Sunlight or excessive contrasts of light and shade 



