JULY. 197 



spot, and all of them an orange band, indistinct on the 

 upper wings ; the under side is greyish-brown, the anterior 

 pair having a white spot, and a curved band of the same ; 

 these are succeeded by a band of orange spots. The hinder 

 wings have a similar marginal band, and several scattered 

 white spots, a large one near the centre, and a series behind, 

 connected with the yellow band by a broad central patch : 

 most of these spots have a minute dusky pupil. This insect 

 is principally found in Durham. 



POLYOMMATUS ARTAXERXES, which appears principally to 

 differ from the last in being of a much darker hue, and the 

 spots having no pupils, is principally met with on Arthur's 

 Seat, near Edinburgh : from this circumstance it is called 

 the Scotch Argus ; but very little seems to be ascertained 

 respecting the history of the insect in its immature state, 

 though the butterfly is in great request, from the extreme 

 rarity of its appearance in any other locality. 



POLYOMMATUS CORYDON. Chalk-hill Blue. This is one 

 of the larger species, measuring an inch and a half. The 

 surface of the male is a very light silvery blue, with a fine 

 silky lustre ; the hinder margin of all the wings having a 

 blackish band, and the inferior pair a series of dusky spots. 

 The surface in the female is brown, each wing having a 



