( xxviii ) 



The only race that we know of for certain outside the type 

 form is Morpho eugenia uraneis. Bates, from the Peruvian 

 Amazons. 



In the Novitates Zoologicae, vol. xxiii, p. 317 (1916), Lord 

 Rothschild correctly surmised the specific distinctness of 

 eugenia and adonis with the placing of the races of each, but 

 called eugenia " marcus," thinking the two names applied to 

 the same insect. Mr. Lathy has obtained from the collectors 

 in French Guiana the following interesting notes on eugenia 

 and adonis. " They are both taken at the same time, though 

 M. eugenia disappears at times, while M. adonis appears to 

 be found all the year round. They are also different in habits, 

 as M. eugenia is only to be captured at daybreak, and after 

 about a quarter of an hour it flies too high to be taken." 



I should like here to acknowledge the generous help of 

 Mr. Joicey, who put the whole of his specimens at my dis- 

 posal for examination and dissection notwithstanding the 

 great rarity of the specimens; also to Lord Rothschild, for 

 help by correspondence, which has contributed to thresh out 

 this difficult problem. 



[Note on Morpho eugenia, Deyr., by Lord Rothschild, 

 F.R.S. — When I stated, Novit. ZooL, vol. xxiii, p. 317, that 

 the MorpJio described by Deyrolle in 1860 must stand as 

 marcus, Schaller, 1785, I gave as my reason that we only 

 knew a brown and white-banded $ taken in copulation with 

 an undoubted ^ of Deyrolle's eugenia. Bates has also stated 

 that he saw $ adonis flying, and that they were lavender 

 grey. I now, however, on further study of material not 

 available at the time I wrote, agree with Mr. Kaye that the 

 $ $ both of adonis and eugenia are brown and white-banded. 

 Seeing also that the adonis $ ? have pointed apices to the 

 fore-wings, and Schaller's picture shows this clearly, I think 

 his name is a pure synonym of adonis, Cram., and the rounded 

 winged silvery blue insect must stand as Morpho eugenia, 

 Deyr.] 



Resemblance, Mimetic and Non-mimetic. — Mr. G. 

 Talbot, on behalf of Mr. J. J. Joicey, exhibited : — 



1. A white-banded mimetic group of African Heterocera 

 from the Cameroons, composed of Massaga maritona, Butl., 



