( li" ) 



Danaine models Amauris echeria, Boisd., and A. niavms, L., 

 form dominicanus, Trim., and explained the reasons why Mr. 

 Marshall considered the mimics to be two forms of a single 

 species (I.e. p. 491). Professor Poulton had written to Mr. 

 G. F. Leigh, advising him to make the attempt to breed from 

 one form or the other, and thus settle the question. Mr. Leigh 

 had done his best but failed in this attempt. He had how- 

 ever made special observations on the two forms which are an 

 interesting addition to our knowledge of them. The differ- 

 ences revealed in the course of this inquiry had convinced Mr. 

 Leigh that the two forms are entirely distinct species. Pro- 

 fessor Poulton was by no means convinced of the soundness of 

 this conclusion. The extraordinary facts now recognized in the 

 genus Precis show us that differences of instinctive behaviour are 

 not necessarily evidence of specific distinction. Indeed every 

 difference relied upon by Mr. Leigh breaks down when tried 

 by the test of this searching comparison. Professor Poulton 

 much hoped that the food-plant would be discovered, eggs 

 obtained, and the only convincing evidence made available. 

 The following paper shows that Mr. Leigh is intimately ac- 

 quainted with these forms in ISTatal, and the Society may 

 anticipate that his energy and powers of observation will 

 ultimately lead to success in the decision of this difiicult and 

 interesting question. 



Notes on Euralia ■wahlbergi, Wallgr., and E. mima, Trim., 

 BY G. F. Leigh, F.E.S. 



Having read (Trans. Ent. Soc. Lond. 1902, pp. 491, 492) 

 that these two butterflies are thought to form but a single 

 species, I have dviring this season (1904-5) been closely observ- 

 ing their habits. I now offer full particulars of what I have 

 seen, — particulars which in my opinion support the conclusion 

 that the two forms are entirely distinct species. 



It has been inferred that they are probably the same species 

 because " they have been taken in coitu several times " {I.e., 

 p. 491). This I do not regard as very strong evidence ; for I 

 have taken Eronia eleodora and E. leda, in eoitu, also jVejJtis 

 agatha and Eurytela hiarhas. The only intermediate specimen 

 I know of here may well be a hybrid result of such paixnng ; 



