deiliniaJ SELIDOSEMIDAE 279 



Though only including a few species, the genus ranges 

 throughout the Northern hemisphere, and one member is found 

 in Austi'alia ; derived from near Euchlaena. 



Head wholly white . . . .1. -pusaria. 



,, with ochreous and black frontal bar . 2 exanthemata. 



1. D. pusaria, L. (i^otundaria, Hw.) 27-30 mm. Head 

 white. Forewings white, sprinkled with dai-k grey ; first, 

 median, and second lines straight, grey, first angulated or 

 obsolete near costa. Hindwings as forewings, but lines slightly 

 curved, first absent. 



Britain to the Hebrides, Ireland, very common ; N. and C. 

 Europe, WC. and N. Asia ; 5, 6. Larva pale green or brown ; 

 a dorsal sometimes incomplete series of purple-red marks (in 

 brown specimens dai'ker brown), sometimes white-edged ; .some- 

 times an interrupted reddish lateral line : on hazel, birch, etc. : 

 7-9. 



2. D. exanthemata, Sc. 27-29 mm. Head white, with an 

 ochreous frontal liar marked with black. Forewings ochreous- 

 whitish, strigulated with grey ; lines gi-eyish-ochreous, first 

 angulated near costa, median irregular, second curved. Hind- 

 wings as forewings, but first line absent. 



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

 and N. Asia; 5, 6. Larva pale green; on 5-12 sometimes 

 a dorsal series of purple-red marks, including black white-edged 

 spots ; subdorsal line yellowish ; a lateral series of purple- 

 red or red-brown marks ; incisions yellowish : on hazel, birch, 

 etc. ; 7-9. 



19. OURAPTBRYX, Lch. 



Face subprominent, with short projecting hairs. Tongue 

 developed. Antennae in ($ shortly and evenly ciliated. Palpi 

 rougli-scaled. Thorax densely hairy beneath. Femora hairy ; 

 posterior tibiae in S dilated. Forewings in S without fovea ; 

 10 absent, 11 anastomosing or connected with 12 and sometimes 

 9 also, 



A small Indo- Malayan genus, containing one European 

 species. 



1. 0. sambucaria, L. 42-54 nmi. Head pale yellow, face 

 ferruginous. Foi-ewings pale yellow, thinly strigulated with 

 pale grey ; first and second lines yellow-grey, nearly straight ; 

 a yellow -gi'ey linear discal mark. Hindwings with ground as 

 in forewings ; second line straight, yellow -gre}', not reaching 

 margins ; termen angulated and strongly caudate in middle, 



