TRIFID.^. 19s 



In Scotland it is very widely distributed and often 

 common. Perthshire, Ayrshire, Argyle, Inverness, Aber- 

 deenshire, Kincardineshire, Moray, Ross, the Orkneys and 

 Hebrides. 



In Ireland principally in the northern half, though it is 

 taken occasionally on the Hill of Howth, near Dublin ; other 

 localities are Meath, Mayo, Sligo, Tyrone, King's County, 

 Antrim, on hills commonly — and Londonderry. 



Abroad it is also found in the more hilly and mountainous 

 districts in Central and Northern Europe with Lapland, and 

 in Southern and Eastern Russia. 



9. H. deutiua, Esper. — Expanse, \\ to U inch. Fore 

 wings grey or brown-grey, marbled with black ; in the 

 blackish central area, beneath the two stigmata, is a large 

 oblique forked pale blotch ; hind wings brown. 



Antennae of the male simple but strongly ciliated with 

 small tufts of bristles, brown ; palpi very broadly and densely 

 tufted, the long scales nearly concealing the apical joint, 

 black-brown, pale grey in front ; head pale grey, barred in 

 front with black, strongly tufted between the antennae ; 

 thorax squared ; collar pale grey with a slender brown cross- 

 bar ; shoulder lappets whitish-grey, edged behind with a 

 black bar, and tipped with white ; rest of thorax bro^^^lish- 

 grey, with crests at the top and back which are whitish, 

 barred with black ; fascicles long, yellowish-white ; abdomen 

 covered near the base with long whitish scales, remainder 

 pale greyish-brown, dorsal crests varying in number from 

 two to five, tipped with black ; lateral and anal tufts spreading, 

 yellowish-brown. Fore wings rather narrow ; costa very 

 gently curved ; apex bluntly angulated ; hind margin rounded, 

 rather full above the anal angle ; dorsal margin straight to 

 near the base ; colour pale grey, or pale greyish-brown, much 

 marbled with brown and black ; basal line abbreviated, 

 angulated, white, edged on both sides by short black streaks 

 or spots ; first line oblique, but curved back near the dorsal 



