Lakextia. 381 



W.— Central area of the fore-ivings very broad, and pure ivltite ; nervule 5 of the hind- 

 wings rising from the hinder half of the discocellular nervide. 



*65. L. Albicillata (Linn.). — Wings white, varied with grey on the hind margin, with an 

 indistinct white subterminal line, the base of the fore-wings and a large costal spot before 

 the tip dark brown, and waved with violet-blue ; the central area bordered behind by a 

 scarcely double, dark brown, and slightly dentated line, dotted on the nervures. Expands 

 about l^ inches. Inhabits Europe and Northern Asia from May to July. The larva is green, 

 with triangular red spots on the back and a yellow stripe on the sides. It feeds on bramble 

 in August and September. The moth and larva are figured at PI. 50, Fig. 15, a, b. 



N. — Fore-wings ii<itli no central spot, the central area not darker than the rest of the wing, 

 or only on the front edge and on the front half of the hinder edge ; the subtenninal line 

 indistinct ; hind-iuings gre}', zuith faint curved lines ; nervule 5 rising from the hinder half of 

 the discocellular nervule. 



*66. L. Derivata (\V. V.). — Fore-wings pale grey, tinged with purplish ; whitish in the 

 central area, with a darker angulated transverse band, blackish in front, before the middle ; 

 the central area with a brown costal spot behind, from which a curved blackish stripe runs 

 obliquely outwards nearly to the hind margin in nervule 4, and then turns inwards to the 

 indistinct line bounding the central area; tip not divided. Expands from i to \\ inches. 

 Inhabits Europe and the Altai in April and May. The larva is pale green, with a red 

 stripe on the back of the first segments, and a reddish head. It feeds on rose in July. The 

 transformations are figured at PI. 48, Fig. 9, a — c. (L. Alhambrata, Stand., from Granada, has 

 pale grey fore-wings, with a broad band near the base, convex and dark brown outside, and 

 shaded with light grey inside ; central area with no markings except a dark dot at the end 

 of the cell ; tip divided by a small black dash ; hind-wings reddish-grey, with a fine black 

 line parallel to the hind margin.) 



*67. L. Impluviata (W. V.). — Fore-wings brownish-grey, the base and the inside of 

 the central area ashy-grey, the base bounded by an oblique black line, and the pale part of 

 the central area bordered on both sides by double dentated black lines, and with two 

 rounded projections in the middle ; the marginal area with dark dentated lines, and with 

 black dashes below the tip. Expands from I to i-^ inches. Inhabits Northern and Central 

 Europe and Siberia in May. The larva is yellowish-grey, with bluish-green lines on the back 

 and sides. It feeds on alder in September. 



*6S. L. Litcrata (Don.). — Fore-wings brownish-grey, with dark transverse lines in the 

 basal area, and with a darker band before the subterminal line, with a black central spot, 

 and the two double bands, the latter not paler, bordered by black lines, and divided by a 

 broad brick-red line ; there are also red transverse lines in the basal area and beyond the 

 subterminal line ; hind margin dotted with black, and the tip divided with dusky. Expands 

 from i^ to \\ inches. Inhabits Northern and Alpine Europe in May and June. The larva 

 is dirty white or greyish, and rather hairy, and the pupa is shining black, and concealed 

 under the bark of trees. The larva feeds on willow and sallow. 



*69. L. Sordidata (Fabr.), Elutata (Hiibn.). — Fore-wings dingy green, more or less varied with 

 rusty-red, with several dark grey irregularly dentated or macular transverse stripes, the two 

 last of which are more or less spotted with whitish ; the subterminal line is black and zigzag, 

 and the tip divided witii black. Varieties occur in which the fore-wings are almost wholly dark 

 grey, with pale costal spots. Expands about i^ inches. Common in Northern and Central 

 Europe, and Northern Asia, in Jul}- and August. The larva is j^ellowish-grey, with three paler 



