RCTROPIS] SELIDOSEMIDAE 261 



Dbld.) 32-40 mm. Head whitish, with dark fuscous frontal 

 bar. Forewings whitish, sometimes tinged with ochreous 

 or fuscous, sprinkled with dark fuscous ; first and second 

 lines subserrate, fuscous, black - marked, dorsally approxi- 

 mated ; an ochreous or fuscous shade before first, and 

 another, with bidentate dark central mark, beyond second ; 

 median and praesubterminal ochreous or fuscous, partly 

 dark-marked. Hindwings as forewings, but first line 'and 

 shade absent, second shade le&s dark-marked ; a dark fuscous 

 discal mark. 



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

 and N. Asia, Japan, N. America; 3-6. Larva brownish-grey, 

 yellowish-grey, or reddish-brown ; subdorsal line dark on 4-9 ; 

 a lateral series of pale blotches, one on 10 conspicuously paler ; 

 4 swollen, with three black spots ; 6 with dark V-shaped mark : 

 on oak, beech, larch, etc. ; 6-9. This insect varies much locally 

 in depth of colouring and time of appearance. 



4. E. consonaria, Hb. 35-38 mm. Differs from E. biundu- 

 laria as follows : wings and markings more brownish -tinged, 

 not ochreous, first and second line dark fuscous, hardly serrate, 

 not approximated dorsally, first shade darker fuscous, second 

 marked with roundish darker central blotch, a distinct dark 

 fuscous discal mark in forewings. 



England to York, E. and S. Ireland, local ; C. Europe, WC. 

 and N. Asia; 5. Larva wrinkled, greenish -ochreous, with 

 numerous dull red waved lines; dorsal dull ochreous, brown- 

 edged ; incisions greenish ; head ochreous-whitish, marked with 

 dark brown : on birch, beech, Pinus, etc. ; 6-8. 



4. DBILEPTENIA, Hb. 



Face loosely scaled. Tongue developed. Antennae in $ 

 bipectinated, apex simple. Palpi rough -scaled. Thorax with 

 low double posterior crest, hairy beneath. Femora glabrous ; 

 posterior tibiae in $ not dilated. Forewings in $ without 

 fovea; 11 sometimes out of 10 near base, sometimes anasto- 

 mosing with 12. 



A small genus, inhabiting the European region ; derived 

 from Selidosema. 



1. D. abietaria, Hb. 40-44 mm. Head fuscous. Forewings 

 pale ochreous, suffused with brown or dark grey and strigulated 

 with dark fuscous ; lines waved ; first, median, and second dark 

 fuscous, stronger on costa, median and second closely approxi- 

 mated dorsally ; subterminal pale, dark-margined anteriorly ; a 



