366 I.EPIDOPTERA. 



the ground colour pale grey, and are striped with dark grey 

 or red-brown; and beautifully-marked similar specimens 

 have been found by the iiev. Joseph Greene in the west of 

 England; in Scotland the typical forms reappear, mixed with 

 pretty reticulated grey fortus, or having very deep red-brown 

 bands; while in the Orkneys a great alteration has taken 

 place, the size of the specimens being reduced to little more 

 tlian one-half that of typical specimens, the colour varying 

 from pale greenish-grey with faintly purplish stripes through 

 every intermediate stage to uniform deep red-brown or 

 purplish-urabreous. Of these many specimens of the greenish- 

 grey ground colour most curiously resemble II. imiiluvinta, 

 and are often mistaken for that species. Those from Armagh 

 in the North of Ireland, taken by the Eev. W. F. Johnson 

 are also rather small, though not etjually so, and their range 

 of colour is somewhat similar. 

 On the wing in .Mav and June. 



li.MU'A stout, tlattened, slightly attenuated to each e.\- 

 tremity, but especially in front ; head rounded, shining, con- 

 spicuously reddish-brown ; Jiorny plates are jilaced upon tlie 

 second and anal segments and on the anal ])rolegs ; body 

 very pale brown, mottled, shaded and dusted with white and 

 grey and furnished with numerous very fine and long, but 

 inconspicuous hairs ; dorsal and subdorsal lines darker grey 

 than the Itody, the intervening spaces often hlled up with 

 dark grey ; spiracular stripes grey but inconspicuous; raised 

 dots and spirac-les distinct, black ; undersurface whitish, or 

 ])ale bluish-grey with a faintly paler central stripe; plates 

 on the second and anal segments pale brown. (C'iias. Fenn.) 



Mav. -lune, or July, till September, or even October; on 

 sallow and willow, tlrawing together two or three of the 

 terminal leaves of a shoot very tightly, and forming a small 

 chamber in which it lives during the day, creeping out at 

 night to feed, in this chamber it lies looped closely together, 

 and is extremelv unwilling to be disturbed. Verv slow of 



