( xxvii ) 



Lord Rothschild, with whom I have been in correspondence 

 for some time over this matter, agrees that he was in error 

 in retaining the name marcus for the pale broader-winged 

 larger species that has recently been discovered in some 

 numbers in French Guiana. The geographical races of adonis 

 do not appear to be sufficiently well known, but the race named 

 by Mr. Lathy as major from N. Peru also has a ? with pointed 

 wings, although the insect is very large. From Iquitos there 

 appears to be an intermediate race both in size and in the costal 

 white spot which is smaller than in major, but larger than in 

 adonis adonis. This form might be known as intermedia. 



Morpho eugenia, Deyr., which until quite recently was so 

 exceedingly rare and of which we were in so much doubt as 

 to its specific distinctness, is now established as a perfectly 

 good species. Apart from the differences of the genitalia 

 the c? <? are easily separable by the more delicate silvery 

 blue and the squarer outline of the wings. The $ $ such as 

 are known are also of squarer build with the apex more blunt 

 than in adonis, but otherwise the colouring seems to be the 

 same. It is possible that the dark ground-colour of the 

 hind-wing extends always well beyond the cell, while in 

 adonis it is only up to or just beyond the cell. In a photo- 

 graph of eight ? ? Morphos in the collection of Mdlle. de 

 Florrack of Paris the upper four appear to be adonis by the 

 sharp fore-wing apices and smaller size, and the lower four 

 eugenia by the blunter fore-wing and larger size. The 

 synonymy of M. eugenia is as follows : — 



S. Morpho eugenia, Deyr., Ann. Soc. Ent. Traver, Ser. 



iii, vol. 8, p. 209 (1860). (Oyapock, French Guiana.) 

 $. Morpho eugenia, Bar., Ann. Soc. Ent. Traver, Ser. iv, 



vol. 4, p. 32 (1864). (Portal, Maroni River.) 

 $. Morpho eugenia, Oberth., Etud. Ent. Liv. vi, p. 27, 



pi. vi, fig. 1 (1881). 

 ??. Morpho adonis, Dist., Trans. Ent. Soc, pi. xx, figs. 1, 



2, p. 397-399. 

 Morpho eugenia, Kirby, Syn. Cat. Diur. Lep., p. 122 (1871). 

 Morpho marcus marcus. Roths., Nov. Zool. xxiii, p. 317 

 (1916). 



