boletobia] PLUSIADAE 147 



1. B. fuliginaria, L. 23-29 mm. Forewings dark fuscous; 

 first and second lines pale ochreous, internally dark-edged, 

 second dentate ; a darker discal mark ; subterminal line pale 

 ochreous, subdentate. Hind wings as forewings, but first line 

 obsolete. 



Kent, Sussex, Middlesex, Worcester, scarce and local ; N. 

 and C. Europe, Asia Minor, N. Asia ; 7. Larva blackish ; 

 dorsal and supraspiracular dots orange : on fungus (a blackish 

 species of the family Muscedines) growing ou rotten wood ; 

 5, 6. 



2. Aethia, Hh. 



Head loosely scaled, with frontal tuft. Antennae in $ 

 ciliated, with long bristles at joints, sometimes with a thicken- 

 ing below middle. Palpi long or very long, ascending or re- 

 curved, thickened with tolerably appressed scales, terminal joint 

 loosely scaled above, pointed. Thorax smooth-scaled. Abdomen 

 not crested. Tibiae with appressed scales ; anterior tibiae in $ 

 sometimes with long expansible hair-pencil. Hindwings : 5 

 parallel to 4. 



Includes a few species inhabiting temperate portions of the 

 northern hemisphere. Piipa in a slight cocoon. 



1. Forewings with entire dai'k fuscous subterminal line 2. 



,, without such line . . .3. 



2. Subterminal line running to apex . . 3. nevioralh. 



„ ,, ,, to costa 2. tarsipennalis. 



3. First and second lines whitish-ochreous . 1. emortualis. 



,, ,, dark brown . 4. derivalis. 



1. A. emortualis, Schiff. 23-27 mm. Forewings pale 

 ochreous finely sprinkled with brown ; first and second lines 

 hardly curved, whitish-ochreous; a whitish-ochreous discal 

 mark. Hindwings as forewings, but first line absent. 



S. England to Oxford and Essex, scarce and local : C. 

 Europe, N. Asia ; 6, 7. Larva without developed prolegs on 

 7 : on oak ; 9, 10. 



2. A. tarsipennalis, Tr. 27-30 mm. Antennae in S with a 

 thickening below middle. Anterior tibiae in $ with long hair- 

 pencil. Forewings light brown ; first and second lines dark 

 fuscous, first curved, second sinuate- curved ; a curved dark 

 fuscous discal mark ; subterminal line straight, dark fuscous, 

 pale-edged posteriorly. Hindwings pale fuscous ; a bent dark 

 fuscous posteriorly pale-edged subterminal line. 



Britain to the Clyde, W. Ireland, common ; C. Europe, N. 



