NOKTH-COUNTRY SPECIES AND FORMS OF LEPIDOPTERA. 107 



and extending the whole gamut, is here confined in the male 

 to two or three small or obsolete spots, sometimes with a black 

 centre, and hardl3^ appearing on the upper surface, and it is 

 very little more marked in the female. The ground colour of 

 the under side of the hind wing is here ash-grey throughout. 



We found it at about 1700 ft. level (Kinloch-Eannoch is nearly 

 700 ft. above the sea) beyond the bifurcation of the AUt Mohr, 

 the streamlet which comes down the hill-side just to the north 

 of the village, and we met it again, though never abundantly, 

 at about the same level at two or three points on the south of 

 the loch, about the Allt Druidhe, and further west. The only 

 food -plants mentioned by Tutt are Rhynchospora alba and 

 Festuat elatior. 



Laidion is the "British Northern form" of Dr. Buckell. 

 His conclusions on the characters and nomenclature of this and 

 the other varieties of tiplion have been in the main accepted by 

 Mr. Rowland-Brown in the admirable and beautifully illustrated 

 Study of this species, which he contributed to the ' Etudes de 

 Lepidopterologie Comparee ' of M. Ch. Oberthiir (Fascicle vii, 

 Rennes, 1913) ; and to this work we owe a great increase in oar 

 knowledge of the range of its three forms in the British Islands. 

 He finds that laidion extends from the Orkneys and Lewis, and 

 the extreme north of the mainland of Scotland to Perthshire on 

 the east, and as far as Loch Lomond in the west. 



The third form referred by Dr. Buckell to type, C. tipJioii, 

 Rottemburg, and called by him the "British Middle Form," 

 occurs in Arran and the south-western counties of Scotland, 

 across the Border Country (Morpeth, Penrith, Carlisle), and do^vn 

 the moorlands on the east coast, through Durham and York- 

 shire to Thorne Waste, north-east of Doncaster, and to the 

 neighbourhood of Rotherham, thus extending almost as far south 

 on the east side of England as does philoxenus on the west side. 

 It appears again in N. Wales (Merionethshire) and over nearly 

 the whole of Ireland. The ocellation is intermediate between tiiat 

 of the two other forms. 



I have three specimens of this form which I took above 

 Richisau, in the Klonthal (Glarus), in 1914, at an elevation of 

 about 4300 ft. — over 1000 ft. higher than the highest Swiss 

 locality given by Wheeler, namely, that recorded by Rowland- 

 Brown " below Andeer, which is 3210 ft. It does not appear, 

 therefore, that altitude is, as Dr. Buckell surmises, a determining 

 factor, any more than temperature. 



The distribution of the varieties of tiplion, so distinct in Great 

 Britain, appears not to have been worked out for the continental 

 forms. In his introductory remarks to Mr. Rowland- Brown's 

 Study M. Oberthiir says : "II s'agit encore de comparer ces trois 

 formes a celles existant sur le continent, et de constater si elles 

 y sont bien semblables aux formes insulaires et s'il ne se trouve 



