COLLIX] HYDRIOMENIDAE 199 



8. COLLIX, Gn. 



Face with short cone of scales. Antennae in $ ciliated. 

 Palpi rough-scaled. Abdomen slightly crested throughout. 

 Forewings : areole double. Hindwings in $ with long sub- 

 costal hair-pencil from base on upper surface, lying beneath 

 forewing ; 8 anastomosing with cell to beyond middle. 



Only the single species is known ; it is probably correlated 

 with or derived from the preceding. 



1. 0. sparsaria, Hb. 22-24 mm. Forewings light brownish- 

 grey, with indistinct darker irregular striae, dark fuscous on 

 costa; veins marked with blackish and whitish except within 

 median band ; subterminal line whitish, forming a white 

 tornal dot ; a black discal dot, connected with costa by a 

 dark fuscous streak. Hindwings as fore wings, but without 

 discal dot or costal darker markings ; termen dentate. 



Hants, Suffolk, Norfolk, Cambridge, York, Cheshire, local ; 

 C. Europe ; 6. Larva pale green ; dorsal line dark green ; sub- 

 dorsal and lateral whitish ; spiracular broad, white : on Lysi- 

 machia vulgaris ; 8, 9. 



9. EUCESTIA, Hb. 



Face forming an obtuse prominence. Antennae in $ 

 ciliated. Palpi rough-scaled. Anterior tibiae with horny 

 apical hook. Forewings: areole double. Hindwings in $ with 

 transparent basal subdorsal spot, bordered beneath by short 

 membranous bladdery ridge, forming small pocket on lower 

 surface ; 3 and 4 sometimes stalked in $ , 8 anastomosing with 

 cell to beyond middle or in $ sometimes connected by bar 

 beyond middle only. 



A genus of some extent, ranging through Europe and Asia ; 

 derived from Hydriomena. 



1. Forewings with pale subcostal streak from near 



base . . .1. spartiata. 



,, without such streak . . .2. 



2. Edges of median band distinct . . .3. 



,, obsolete . .3. griseata. 



3. Fourth fascia angulated above middle . 4. plagiata. 



,. not angulated above middle 2. rufata, 



1. E. spartiata, Fuesl. 32-35 mm. Forewings elongate, 

 rather dark brown ; a median series of three blotches outlined 

 with brownish -ochreous, discal one including a whitish dash 

 and dark fuscous spot; a whitish or brownish -ochreous sub- 

 costal streak from near base to apex ; subterminal line whitish, 



