4o6 LEPIDOPTERA. 



shire, Yorkshire, North Lancashire, Durham, and Westmore- 

 land, and there is a single record in Leicestershire. Also 

 locally in North Wales, but I never saw it in the limestone 

 districts of South Wales. In Scotland it becomes in some 

 degree a mountain insect, and is found in Berwickshire, 

 Roxburghshire, and Midlothian ; also at liraemar, Aberdeen- 

 shire ; in Glen Lochay, Perthshire ; and in Renfrew. In 

 Ireland it is common in suitable places, and is recorded from 

 Kerry, Clare, Galway, Louth, and Down. Abroad it is spread 

 all over Europe except the Arctic portion, including the 

 greater part of Scandinavia ; also Armenia, Bithynia, the 

 Taurus ilountain district, the Trans-Caspian region, and the 

 Canary Isles. 



5. A. pentadactylus, L. — Expanse 1^ inch. Fore 

 wings long, deeply fissured, the tips drooping ; whole insect 

 shining snow white. 



AntenniB of the male simple, brownish-white, palpi thread- 

 like, white ; head, thorax and abdomen snow-white, but the 

 scales of the abdomen are large and loose and often get dis- 

 placed, showing the skin beneath to be bright green. Fore 

 wings long, broadly spreading behind, the two tips of lobes 

 drooping and pointed ; the costa much arched ; cilia very 

 long and full ; whoU}' shining snow-white. Hind wings 

 long, divided to the base, all three lobes slender but broadly 

 and strongly ciliated, also shining snow-white. Legs long 

 and slender, equally white. Female quite similar. 



Underside also wholly shining .snow-white. 



On the wing in June and July. 



Larva very bristly, the hairs at each extremity four times 

 as long as those of the rest of the body ; head shining yellow 

 or green ; body somewhat cylindrical, though a little thicker 

 in the middle, light green, with a darker green dorsal stripe ; 

 subdorsal lines white, but interrupted on every segment by a 

 yellow bar across the back ; raised dots black ; the hairs grey. 



July or August through the autumn, hybernating while 



