108 



THE ENTOMOLOGIST. 



pas des formes continentales inexistantes en Angleterre, Ecosse 

 et Irlande " (p. 5). 



Erehia epiphron occurred in the Kannoch district in very much 

 the same locaHties as C. tiphon. We found it up the Allt Mohr 

 at a slightly lower level and on the south side of the loch at 

 about the 1600-ft. level. On ascending the hill-side we met a 

 few before the upper level of the bracken was reached, but they 

 became more abundant some 200 or 300 ft. higher. Our best 

 ground was a shelving grassy terrace among the heather at 

 about this level just east of the Allt Druidhe, where tracts of 

 Myrica gale and a low growth of Salix caprcea formed features.* 



This species is not quite so dependent on sunlight for its 

 activity as tiphon, as even after the sun bad become hidden one 

 could take a few on the wing. It seemed to extend very little 

 higher up the hill-side than the terrace mentioned — at least on 

 the one occasion on which I tried to ascertain the upper limit of 

 its distribution. 



Both the Lake Country and the Rannoch forms of epiphron 

 appear to belong to the variety cassiope, Fab., though, as set 

 forth by Tutt,t there are marked differences between them. 

 The rusty spots stand out more conspicuously in the latter, and 

 this is partly due to their being slightly yellower (less rusty), 

 and partly to the fact that the dark ground colour of the wing 

 is maintained at a nearly uniform depth to the margin, instead 

 of somewhat paling off towards the margin. 



The average expanse across the wings in twenty-two Lake 

 district specimens is 31'13 mm., in twenty from Loch Rannoch 

 33*35 mm. — a difference of 2j mm. 



I am inclined to agree with Tutt that the fore wings are 

 narrower in the former. But although these differences are 

 noticeable when whole series from the two localities are compared,- 

 there are, as he says, among them examples which it would be 

 difficult to assign to either locality if they were unlabelled. 



A. medon var. artaxerxes. Our hunting-grounds for this 

 species were the ravine of the Allt Mohr just above the village, 

 and a meadow bordering the road to the east of Drumchastle 

 Wood some 1^ miles down the valley. In both there was 

 shelter from the prevalent westerly winds. It is a charming little 

 insect with its clean white discal spots on the fore wing, and all 

 the more interesting to us after making the acquaintance of 

 salmacis on our way north. If it had not been for the signal flag 

 of the Helianthemum flowers we might have searched for it in vain. 



* Here is a list of the common plants which I collected on this terrace : Banun- 

 cnlus repens, Folygala vulgaris, Potentilla tormentilla, Galium saxatile, Caluna 

 rulfjaris. Erica tetralix, Pinguictila vulgaris, Salix caprtea, Myrica gale, Gymna- 

 denia conopsea, Jiincus squarrosus, Scirpus caspitosiis, Garex pilulifera, C. binervis^ 

 Nardus stricta, Anthoxanthum odoratiim, Agrostis canina, Airaccespitosa, Molinia 

 cairulea, Ffstuca oi^ina. 



t ' British Butterflies,' pp. 425-6. 



