LARENTin.-E— I -RNUSIA . 195 



The motli sits during the day very closely upon the trinik-s 

 of trees, especially those of its food-plant, the mountain ash. 

 or upon pine trunks, and does not seem to be readily alarmed, 

 so that it may easily be secured. Doubtless it flies at dusk 

 about the trees. 



It was discovered in the year 1839 at Hafod in Cardigan- 

 shire by ]Mr. John Curtis, and described by him in his great 

 work, " British Kutomology."' It appears to be almost wholly 

 confined to hill districts, but has been taken so far south as 

 Dulverton, Devon ; Crowcombe and Weston-super-Mare, 

 Somerset ; and the Cotswolds, CTloucestershire ; but appears 

 to be much more at home, though still very local, in York- 

 shire — where in the Sheffield and Rotherham district its 

 melanic varieties are found — in Dymingsdale. North Stafford- 

 shire; Lancashire, Westmoreland, Cumberland, Durham, and 

 Northumberland. In Wales in Cardiganshire, as already 

 stated, and in Merionethshire. In Scotland in Roxburgh- 

 shire, on Ben Nevis, in Arran. in Xincardineshii-e and 

 Inverness, and once taken at Moncrieft'e Hill, l^erthshire : 

 Dr. F. B. White says in the districts of the Tweed, Tay, 

 Solway. Clycfe, and Argyle. In Ireland it has a rather wide 

 distribution ; I have myself taken it at Powerscourt in 

 tlie Wicklovv Mountain district; it has once occurred at 

 Howth. near JJiiblin ; and is found in Jverry. Mayo, Sligo, 

 Tyrone. Donegal, and Derry. and on the Mourn ^Sfountains in 

 Down. 



Abroad its range is very wide : Switzerland, the north of 

 Italy, the mountain districts of Coriuthia and Silesia, in Fin- 

 land, and Norway ; also in the great Central Asian mountain 

 region, and in Japan, where it is quite typical. In North 

 America it is found in Canada, with Anticosti. in New York 

 State, and on Mount Washington, New Hampshire. 



