Mimetic AUi-(irli()ii. 331 



established system, and certain species which seem to 

 hover on the outskirts of minuftic g-roiips, undecided as it 

 were wliether to throw in their lot with one association 

 or anotlier. 



I am indebted to I'rof'essor Poulton, P.R.S., for free 

 access to tlie Hope Department, and for permission to 

 fi^-uro insects from the collection under his cliarfije. 



Note. 



Tn tho. course of the discussion which followed the roadinqr of 

 tliis piipor, my friend Professor Poulton expressed the opinion that 

 tho term "mimicry" should bo restricted entirely to cases of 

 liatesian association, and should not be applied to resemblances 

 between dist'isteful forms. I atn, of course, entirely at one with 

 Professor Poulton as to tho essential difference between the false 

 warning which is tho leading feature in the one case, and the true 

 warning which characterises the other ; and I agree that it would 

 be most desirable to mark the distinction by the uso of scpai'ate 

 terms. Though the present paper must stand as it was read, I am 

 wiUiiig in future to attempt the restriction which he recommends. 

 J'erlia[)s " MiiUerian assimilation" and "reciprocal assimilation," 

 thougli a little cumbrous, may serve instead of tho terms used in 

 the text ; and it may be hofxid that the advantage of greater pre- 

 cision thus gained will outweigh the disadvantage of having to 

 drop such convenient words as " mimic," "mimetic" and "model" 

 when speaking of a Miilleriau group. — June 2, 1897. 



