LEPIDOPTEROLOGIE COMPAREE IO3 



a view I shall never forget lay stretched before us — loch, moiin- 

 tain, and moor; a study in purple and rich green, and over ail the 

 sunshine! Perfect silence... " 



The " Large Heaths " for years hgured in my collection, and 

 were unmistakable laidion; and, though stuck upon common pins, 

 were fine examples, remarkable alike for colour and size. 



II. MIDDLE FORM 



B) C œnonympha tiphon, Rott., in the Lowlands of Scotland. 

 2'iphon, Rott. (type). 



From 56" latitude southwards the Middle Form, tiphon, Rott., 

 may be said to be established, and dominant to the Border. 

 Crossing the Solway Firth, and through Cumberland, and North 

 Westmoreland it presently developes the Southern Form {philo- 

 xenus, Esp). But through the north eastern English counties from 

 Cheviot to Humber the Middle Form remains; yet liable every- 

 where to aberration rather, I think, in the direction of laidion, 

 than of fhiloxemis. 



Intermediate as we hâve seen in Knapdale, tiphon appears in 

 the western isle of Arran. In the county of Renfrewshire, imme- 

 diately south of the Clyde estuary, it used to be common enough, 

 especially on Paisley Moss. But hère in récent years it has become 

 extinct, owing to the drainage and incorporation of waste lands 

 for building and industrial purposes, as well as to the poisoned 

 atmosphère within smokereach of the great Scotch manufacturing 

 cities. Yet in Ayrshire Mr. J. P. Duncan reports it far from 

 uncommon, and actually flying on the sand hills of the Bay of Ayr 

 near Monkton, as well as on Shewalton Moss; and not improbably 

 it continues to exist in favourable local i'ties on the west' coast 

 right down to Wigtownshire, where Mr. Roger S. Gordon of 



