222 NOTODONTINA [PELURQA 



margins, edges dark fuscous, anterior angulated near costa, 

 posterior with rounded median projection; a black discal dot; 

 a dark brown apical streak ; cilia barred. Hindwings whitish- 

 ochreous, fuscous-tinged, with faint darker striae. 



England, Edinburgh, N. and C. Ireland, rather local ; N. 

 and C. Europe, N. Asia ; 7. Larva greenish-brown, darker- 

 streaked ; 5-7 with a yellow-ochreous spot, marked with dark 

 V-shaped mark; dots white, conspicuous; spiracular line very 

 pale pinkish ; head grey : on Atriplex and Chenopodiwm ; 8, 9. 



18. OPEROPHTERA, Kb. 



Face smooth. Antennae in $ strongly ciliated with 

 fascicles. Palpi short, loosely scaled. Forewings : areole 

 simple. Hindwings : 8 anastomosing with cell to beyond 

 middle. Wings of $ aborted. 



Includes only three or four species, confined to northern 

 temperate regions. 



Hindwings pale fuscous . . .1. brumata. 



whitish . . . .2. boreata. 



1. 0. brumata, L. 25-28 mm. Forewings light brownish, 

 densely fuscous - sprinkled, with fuscous striae, sometimes 

 partially marked with dark fuscous on veins ; basal area and 

 fourth fascia slightly darker. Hindwings pale fuscous, with 

 several faint darker lines. Wings of $ shorter than half length 

 of abdomen, grey-whitish mixed with dark fuscous. 



Britain to the Shetlands, Ireland, abundant; N. and C. 

 Europe; 10-1. Larva green, greenish -grey, or yellowish; 

 dorsal line darker or almost blackish ; subdorsal and spiracular 

 whitish or yellowish ; head green, sometimes brown-marked or 

 black : on oak, apple, hawthorn, etc. ; 5, 6. The larva is 

 sometimes excessively abundant, and may then become highly 

 injurious in orchards, wholly stripping the trees of leaves. 



2. 0. boreata, Hb. 30-33 mm. Forewings very pale greyish- 

 ochreous, densely sprinkled with light fuscous, with faint 

 fuscous striae, those of fourth and fifth fasciae and anterior 

 edge of third distinct ; basal area rather darker ; veins some- 

 times partly darker-marked. Hindwings whitish ; a faint grey 

 median stria. Wings of $ as long as f of abdomen, grey 

 mixed with whitish, forewings with darker blackish-edged band, 

 hind wings with grey bar. 



Britain to Boss, somewhat local ; C. Europe ; 10, 11. Larva 

 pale yellowish-green ; dorsal line darker ; subdorsal and spira- 

 cular whitish ; head grey, black-marked : on birch ; 6. 



