TRIFJDyE. 229 



it may be captured without the aid of a lantern. It settles 

 down with closed wings to feed, and is captured with perfect 

 ease in this manner, but is rarely taken on the wing. Never 

 an abundant species, but very widely distributed, apparently 

 occurring in woodland districts, marshes, and heaths on which 

 birch grows, throughout the Southern and Eastern counties 

 of England, and in some of the Western and Midland 

 counties, since I have records from Devon, Somerset, 

 Gloucestershire, Herefordshire, Worcestershire Warwickshire, 

 Leicestershire, Staffordshire, Derbyshire, Cheshire, Lanca- 

 shire, most parts of Yorkshire, Lincolnshire, and Cumberland. 

 In Wales it is found in Glamorganshire and Carmarthenshire, 

 and can hardly be absent from the birch woods of North 

 Wales. Widely distributed, but scarce, in Scotland ; found 

 in Ayrshire, at Kilmun and Dunoon in the Clyde District ; 

 in Argyleshire, Perthshire ; in Eastern districts to Ross and 

 Moray; and even more commonly in Sutherlandshire. Confined 

 apparently to the southern half of Ireland, Dublin, Wicklow, 

 Waterford, Kerry, and Galway. Abroad it extends through- 

 out Central Europe, Northern Europe except the coldest 

 portions, Northern Italy, Southern Russia, and Siberia. 



2. A. aceris, L. — Expanse H to If inch. Fore wings 

 pale grey, much mottled with darker grey ; second line 

 white ; hind wings white with blackish nervures. 



Antennee of the male stout, ribbed, naked, greyish-brown ; 

 head pale grey ; thorax robust, pale grey dusted with dark 

 grey ; shoulder lappets rather raised ; at the back of the 

 thorax is an indistinct crest ; fascicles of scales from the 

 back, dense, white ; abdomen white, faintly dusted with dark 

 grey ; the first three segments covered with loose hair-scales, 

 the central dorsal portion of which is raised into obscure 

 crests and tipped with dark grey. Fore wings stoutly built, 

 broadly triangular, conspicuously broader and more ample 

 than in the other species of the genus ; costal margin very 

 slightly curved, apex bluntly angulated ; hind margin long, 



