Common Blue.
1, 2, 7, 10, 12 male; 3, 4, 5, 6, 8, 9, 11, 13 female.
Pl. 107.
Common Blue.
Eggs, natural size and enlarged; caterpillars and chrysalids.
The intermediate form, salmacis and its modifications, is found in the neighbourhood of Richmond, Yorks, and thence northward to the Scottish border.
Var. artaxerxes occurs in Scotland from Roxburgh to Aberdeenshire on the east, and from Dumfries to the Clyde on the west. Kane records four specimens from Co. Galway, and these are all that are known of the species from Ireland. This form, together with the var. salmacis, are not found anywhere outside the United Kingdom, and, it may be added, the latter appears to be getting scarce—at least, in some of its old haunts in Durham.