opisthograptis] 8ELIDOSEMIDAE 257 



1. O. notata, L. 25-28 mm. Head oohreous. Antennae in 

 $ dentate. Forewings oohreous- whitish, strigulated with 

 ochreous-grey ; first, median, and ^<7^^>\ 

 second lines oohreous -grey, on s'ZZi^^^) 



costa brown, second angulated, in /^^ 7 



middle traversing an oval blackish S^Z^X — / 



spot cut by oohreous - whitish /%■ -^ — . / 



veins ; a ferruginous-brown spot ^^ ' ^y 



on costa beyond second ; upper "^^~~ _/ 



half of termen subconcave, its 



cilia light brown. Hindwings X, ^^v 



with colour and median line as in fs*^ '\~~~~ — 4 



forewings, second partly dotted jv\^~- — L I— : — :_M 

 with dark fuscous ; a dark fuscous ^5nv ^^\T~^^v 

 discal dot; termen subcaudate- ^\\ \/ 



angulated. ^ 



S. England to Suffolk and Neu,ation of opMhogmptu UtoMa. 

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

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

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



2. 0. alternaria, Hb. 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 c? dentate. Forowings 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 ferruginous 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, WG. and N. 

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

 spiraoular 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 



