254 LEPIDOPTERA. 



few or none in the Midland Counties. In Yorkshire it is 

 very local. In Wales found in Carmarthenshire, Pembroke- 

 shire, and on the North Wales coast — probably, indeed, all 

 round the coast. In Scotland, in various forms, at Ardrossan, 

 Dunoon, and elsewhere in the Clyde Valley, in Kincardine- 

 -shire, Perthshire, Aberdeenshire, Moray, and elsewhere in 

 the provinces of the "Tweed, Forth, Tay, Dee, Moray, 

 Solway and Clyde," as indicated by Dr. Buchanan White ; 

 also in the Isle of Lewis (Hebrides), the Orkneys, and 

 Shetlands — probably on all rocky coasts when looked for. 

 In Ireland equally well distributed, Howth, near Dublin, 

 Cork, Kerry, Galway, Sligo, Westmeath, Monaghan, Tyrone, 

 Armagh, Donegal, Derry, and Antrim, and also on the small 

 islets scattered along the west coast. Abroad it extends 

 over the whole of the Continent of Europe, except the 

 extreme north and south, Algeria, Asia Minor, and Tartary. 



7. D. csesia, Bkli. — Expanse 1|- to 1| inch. Fore wings 

 rather pointed, dark slate -grey, with the markings very 

 obscure ; hind wings blackish-brown ; thorax bluish-slate. 



Antenna of the male simple, very minutely ciliated, dark 

 brown with whitish ciliations ; palpi and head tufted, dark 

 slate-grey ; thorax densely covered with raised scales, dark 

 slate- grey with a dusting of white, and at the base of the 

 collar with whitish-grey; upper edge of the collar dusted 

 with black; on the top and back are small crests, the latter 

 duplicated, and all the tufts tipped with black-grey ; fascicles 

 greyish- white ; abdomen pale slate-grey, very faintly barred 

 with darker, and having upon the first two or three segments 

 small slate-grey crests half obscured among the long similar 

 scales ; lateral tufts distinct, spreading ; anal tuft dense, 

 rather paler. Fore wings somewhat pointed, narrow at 

 the base ; costa straight ; apex long and very sharply rounded 

 off; hind margin oblique, straight from the apex but rounded 

 off below the middle ; dorsal margin slightly but gracefully 

 curved ; colour dark slate-grey or bluish-slate very faintly 



