opisTHOoRAPTis] SELIDOSEMIDAE 257 



1. 0. notata, L. 25-28 mm. Head ochreous. Antennae in 

 $ dentate. Forewings ochreous- whitish, strigulated with 



ochreous -grey ; first, median, and 

 second hnes ochreous -grey, on 

 costa bx'own, second angulated, in 

 middle traversing an oval blackish 

 spot cut by ochreous - whitish 

 veins ; a ferruginous-brown spot 

 on costa beyond second ; upper 

 half of termen subconcave, its 

 cilia light brown. Hindwings 

 with colour and median line as in 

 forewings, second partly dotted 

 with dark fuscous ; a dark fuscous 

 discal dot ; termen subcaudate- 

 angulated. 



S. England to Suffolk and Neurationof 0;u.«Ao,rap«s ^(eoZato. 



Gloucester, Cheshire, Inverness, Ross, local ; Europe, WC. and 

 N. Asia ; 6. Larva dark green, sides yellowish-brown ; a dorsal 

 series of yellowish-brown spots : on Salix and birch ; 8, 9. 



2. 0. alternaria, Hh. 25-28 mm. Differs from 0. notata as 

 follows : colour pale whitish -fuscous, strigulated with grey, 

 hindwings more whitish basally ; lines grey, second line less 

 angulated, followed by a darker suffusion, traversed spot much 

 smaller, termen more concave ; termen of hindwings more 

 caudate. 



Sussex to Devon, Westmoreland, local ; C. Europe, WC. and 

 N. Asia ; 6, 7. Larva light green ; three triangular reddish 

 lateral marks towards middle : on Salix ; 9. 



3. 0. liturata, CI. 26-29 mm. Head yellow -ochreous. 

 Antennae in $ dentate. Forewings pale fuscous, strigulated 

 with darker ; first, median, and second lines fuscous, on costa 

 darker, second darker-dotted, followed by a pale reddish- 

 ochreous suffusion, and ferruginpus costal spot ; a fuscous 

 discal mark ; termen subsinuate. Hindwings as forewings, but 

 more ochreous-whitish ; first line and costal spot absent ; discal 

 dot darker ; termen angulated. 



Britain to Ross, common ; N. and C. Europe, WC. and N. 

 Asia ; 5-7. Larva green ; dorsal and subdorsal lines whitish ; 

 spiracular white ; head brown : on Pinus abies ; 9-10. 



4. 0. clathrata, L. 22-26 mm. Head black mixed with 

 whitish. Antennae in $ filiform. Forewings yellowish- white 

 or pale yellowish, margins strigulated with dark fuscous, veins 



s 



