Il8 LÉPIDOPTÉROLOGIE COMPARÉE 



tendency in local variation towards the southern, and more occa- 

 sionally toward the northern forms of Britain, is less markcd 

 in the Irish typical tiphon than in the English. Isolated spé- 

 cimens from Killarney are reported akin to phtloxemis, but 

 Birchall, also, supports the view that tiphon (= daims, Fab.) 

 prédominâtes; while he further notes the generally northern 

 character even of the South Irish fauna, accounting for it partly as 

 a resuit of the later geological séparation of Ireland from 

 Scotland; and the fact that the tiphon of Ireland approximate 

 nearest to the Middle Form in Scotland lends colour to the thcory. 

 The examples sent me from Enniskillen in Co. Fermanagh differ 

 from those of other localities in hardly any particular but that 

 of size. 



DISTRIBUTION 



In the north-western County of Donegal, the late Edward 

 Newman found tiphon long ago. Mr. D. C. Campbell met with 

 the species on July 22nd 1892, on the moors between Gartan, and 

 Glenveagh; and again at Lough Sait on the 23rd. The Rev. 

 W. F. Johnson reports a single example on the mountain at 

 Ardara in the extrême vvest of the county on the Atlantic coast. 



From north Antrim, the north-east coast of which is separated 

 from the Scottish mainland by a bare twenty miles of sea, 

 Mr. Campbell records how " the very dark form of the " Large 

 Heath " occurred very commonly in the Garry bogs near Bally- 

 money "; the form to be expected there as coming across from 

 the Mull of Cantire, at the base of w^hich in Knapdale, as has 

 been stated {antea, p. 102) we seem to be at a parting of the ways 

 between var. laidion, and the type. 



In Tyrone it is generally distributed over the bogs, from which 

 my correspondent Mr. T. Gréer, of Stewartstown in the eastern 

 part of the county, furnished me this summer with a fine séries. 

 They were taken near Lough Fea (the Irish Lough = Scotch 



