[22]

March 15/68/ Bates XX Males generally depart most from type; females usual rarer (like Birds). In Eubagis the males are coloured in 2 or 3 conspicuously different manners whilst in females are all nearly alike. In the species in which both sexes alike the males resemble closely the female of others.

In genera with sapphire like Butterfly both sexes beautiful in colour; & viz different in others both beautiful & not very different in others.

Polyommatus very good case as to which of more diversity of sexual colouring seen than in Birds.

Æneas group. The males of P. sesostris varies & acquires a small crimson stripe on post. wings, & thus acquires a character common to its female & many females of the common group, & also varies a little in green [illeg] patch on ant. wing. Males of P. childrenæ vary more in extent of green patch on ant wing, & in size of white mark & in size of crimson stripe on post. wings, so that there is a great difference & perfect gradation between most gaudy males, with

[22v]

most contrasted colour in P. childrenæ, & least gaudy, yet very handsome male of P. sesostris. Certainly sexual selection, if it comes into play could easily add greatly to continual difference of a male Papilio in this case. - Wallace has case of variability Moth - Shetland Is - Trimen Madagascar.

Stal for his note that Æneas group of Papilio puts gradation

[Descent 1: 402, n18: "Wallace on the Papilionidæ of the Malayan Region, in 'Transact. Linn. Soc.' vol. xxv. 1865, p. 8, 36. A striking case of a rare variety, strictly intermediate between two other well-marked female varieties, is given by Mr. Wallace. See also Mr. Bates, in 'Proc. Entomolog. Soc.' Nov. 19th, 1866, p. xl."]