NORTH-COUNTRY SPECIES AND FORMS OF LEPIDOPTERA. 85 



ia characterised by the dark filbert-nut brown of the upper 

 side, only slightly paler in the female, and by the full develop- 

 ment of the ocellated spots, in which, on the under sides, a 

 silvery- white middle is succeeded by a broad ring of velvety 

 black, and this by pale ochre, giving a very bold and hand- 

 some appearance. The spots are also well marked on the 

 upper sides. On the under side of the hind wing there is a 

 spot between each of the nervures, that between the two 

 posterior being usually double — a feature found in some other 

 Satyrids {e.g. Pararcie mcgcera and^J^. achine and in M. galatea) 

 and almost universal in the Lycsenidi. In 14 per cent, of my 

 males, and in 21 per cent, of females, a spot varying in degree 

 of development is present between the first (submedian) nervure 

 and the margin of the wing. My specimens show a good deal 

 of variation in the colour of the under-side of the margin of the 

 hind wing, from ashy gray to tawny brown, and in this respect 

 do not agree with Dr. Buckell's description. I have one well- 

 marked variety, in which a bar of white extends from the middle 

 of the irregular white band which traverses the hind wing (uu. s.) 

 to the base of the wing. 



We found tipJton equally abundant on Witherslack Moss, 

 and it appears to range widely over the other mosses in this 

 neighbourhood. 



A. si/lvanm was fairly common on Meathop Moss. 



In tlie little half-overgrown quarry near the inn, mentioned 

 above, the rock rose {Helianthemum) is common on the limestone, 

 and here we found a colony of A. medoii. Several, though not 

 nenrly all of them, have the discal spot (up. s. f. w.) ringed with 

 a margin of white of varying breadth, and the black middles of the 

 spots on the under side in some cases reduced in size. This 

 variation seems to be better marked in the females than the 

 males. Several of my males have the rusty spots absent from 

 the upper sides of the fore wings. In all four respects they 

 approach the form Artaxerxes, which is peculiar to Scotland. 



The population of medon seems curiously localised in this 

 neighbourhood, considering how widely distributed its food-plant 

 {Helianthemum) is. Later I found the species fairly abundant 

 at one point on Arnside Knott, and there the variation seemed to 

 be somewhat better marked. It appears to be the var. salmacis, 

 for some time regarded as a distinct species, and known as the 

 Castle Eden Argus. We were interested in finding it on this 

 west side of England ; but I have females of medon which have 

 just as good a right, as far as I know, to be called salmacis, from 

 the Eoman Road near Cambridge, Royston and Hitchin, and 

 almost as well marked as any of these Westmorland forms, 

 though of course they are very much scarcer. 



In the little quarry we also found a colony of C. minimus 

 past their best condition, and the females of P. icarus were 



