( xxvi ) 



hibited Mor])ho eugenia under the name of M. marcus, I 

 suggested that M. eugenia might possibly be the wet-season 

 form of M. adonis. In the light of evidence of the genitalia 

 this theory is untenable, as it is most unlikely that such great 

 differences in tbe harpes could be accounted for seasonally. 

 On the advice of Lord Eothschild I have also prepared the 

 genitalia of Araschnia levana and its summer generation prorsa 

 to test if there was any seasonal variation in these organs, but 

 none was apparent. The settling of the specific distinctness 

 has automatically removed a great deal of the nomenclatorial 

 muddle. In British Guiana no male of M. eugenia has ever 

 been recorded with certainty. But on the Potaro River 

 M. adonis is fairly common, and the two females that were 

 sent from there together with ten males by Mr. Roberts 

 between the years 1902-1908 unquestionably are paired in- 

 sects of the same species — adonis. Of the small number of 

 adonis females that are available for examination it appears 

 to be clear that the fore-wing apex is rather pointed and the 

 anal angled projection rather pronounced. On this character 

 it is pretty certain that Schaller's figure of Papilio marcus in 

 Naturforscher, vol. 21, p. 174, pi. iv, ff. 1, 2 (1785) is the $ of 

 Morpho adonis. Distant recognised this in 1881 in the Trans. 

 Ent. Soc. for that year, p. 3^. The figure which he gives, 

 PI. XX, really looks as if it might be a female of M. eugenia, 

 and until a o eugenia has been taken in British Guiana there 

 must be a doubt if Distant's figure is a $ of adonis or eugenia. 

 It certainly looks like a ? eugenia from its very large size and 

 blunt fore-wing apex. 



The synonymy of Morpho adonis is now as follows : — 



c?. Papilio adonis, Cram., Pap. Ex., i, t. 61, A.B. (1779). 

 Morpho adonis, Godt., Enc. Meth., ix, p. 439, n. 3 (1823). 

 ?. Papilio marcus, Schall, Naturf., xxi, p. 174, n. 4, 



t. 4, f. 1, 2 (1785). 

 Zeuxidia marcus, Kirby, Syn. Cat. Diurn. Lep., p. 116, 



8 (1871). 

 ^ $. Morpho adonis, Fruh. in Seitz, vol. v, p. 349 (1913) 



(= eugenia, Deyr. <S) err. det. 

 Morpho adonis, Roths., Nov. Zool. xxiii, p. 317, 1916. 



