f.nnomos] SELIDOSEMIDAE 287 



oohreous ; a dark blotch on 5 ; 6 with transverse prominence 

 and two tubercles, 7 and 12 with pairs of tubercles, 9 with a 

 prominence : on sycamore, birch, etc. ; 7, 8. 



27. Gonodontis, Hb. 



Face with dense projecting scales. Tongue developed or 

 obsolete. Antennae in 6 bipectinated to apex. Palpi rough- 

 scaled. Thorax densely hairy above and beneath, tending to 

 be slightly crested anteriorly. Femora densely hairy ; posterior 

 tibiae in $ not dilated. Forewings in $ without fovea ; 

 10 often connected or anastomosing with 9, occasionally 

 with 11. 



Includes only a few European species ; it is derived from 

 the ancestral Prosopolopha group. 



Termen of forewings strongly dentate . 1. bidentata. 



„ ,, not strongly dentate . 2. elinguaria. 



1. G. bidentata, Gl. 40-48 mm. Head light fuscous. 

 Forewings brown, strigulated with blackish ; first and second 

 lines nearly straight, serrate, blackish -grey, marked with 

 whitish dots ; pracsubterminal sometimes suffusedly darker ; a 

 grey black-edged discal spot ; termen strongly and irregularly 

 dentate. Hindwings as forewings, but paler, first line absent, 

 termen not dentate. 



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

 Europe, N. Asia ; 5, 6. Larva with rudimentary prolegs on 8 

 and 9 ; ashy -grey or brown, sometimes with darker dorsal 

 diamonds or lateral line ; or blackish, irregularly marked with 

 pale green; a semicircular plate on 12: on hazel, birch, etc.; 

 7-9. 



2. G-. elinguaria, L. 34-37 mm. Head whitish-ochreous. 

 Forewings whitish-ochreous, sometimes sprinkled with dark 

 fuscous ; first line nearly straight, second sinuate, dark fuscous, 

 included space usually light brown ; a blackish sometimes pale- 

 centred discal spot ; termen waved. Hindwings whitish- 

 ochreous ; a dark fuscous discal dot ; sometimes an indistinct 

 curved fuscous median line. 



Britain to Sutherland, N. and W. Ireland, common ; N. and 

 C. Europe, WC. and N. Asia; 7, 8. Larva ochreous-brown or 

 pale ochrcous, darker-marked ; dorsal lino greyish, expanded on 

 incisions, partially edged with dark fuscous and mai'ked with 

 small V-shaped marks: a semicircular plate on 12: on hazel, 

 blackthorn, etc. ; 5, 6. 



