LITHOSIA] ARCTIADAE 27 



hardly arched; whitish -ochreous, sometimes greyish -tinged. 

 Hindwings whitish-ochreous, yellowish-tinged; costa broadly 

 suffused with grey. 



Kent (Deal), on coast sandhills, very local ; C. Europe, WC. 

 and N. Asia ; 8. Larva brown, hairs short, brown ; dorsal line 

 black ; subdorsal dark brown ; spiracular whitish ; head black : 

 on saline lichens ; 9-6. 



2. L. sericea, Gregs. (molybdeola, Gn.) 30-32 mm. Head 

 and collar orange. Forewings with costa gently arched ; rather 

 dark grey ; a whitish-ochreous costal streak, becoming orange 

 on costa, posteriorly attenuated and not reaching apex ; cilia 

 greyish-orange, tips paler. Hindwings light ochreous-yellowish, 

 suffused with grey dorsally, sometimes more or less wholly. 



Cheshire, Lancashire, local ; not yet found elsewhere ; 7. 

 Larva blackish-grey, hairs short, brown ; dorsal line black ; sub- 

 dorsal interrupted, orange-red, white-spotted ; lateral black ; 

 spiracular ferruginous, black-edged ; head black : on lichens, 

 dead leaves, etc. ; 8-5. It is uncertain whether this is any- 

 thing more than a local form of L. complana ; the larvae are 

 practically identical. 



3. L. complana, L. 30-32 mm. Head and collar deep orange. 

 Forewings with costa gently arched ; rather light grey ; a 

 suffused orange costal streak, equally broad throughout ; cilia 

 light orange. Hindwings ochreous-yellow. 



England to Lancashire, N. and E. Ireland, local ; Europe, 

 Asia Minor; 7. Larva blackish-grey or brown, hairs short, 

 brown ; dorsal line black ; subdorsal forming a series of oval 

 orange-red and white spots ; spiracular rather broad, ferrugin- 

 ous ; head blackish : on lichens ; 8-6. 



4. L. lurideola, Zk. (complanula, B.) 31 -33 mm. Head 

 orange. Collar orange, middle more or less grey. Forewings 

 with costa posteriorly arched ; rather dark grey ; a whitish- 

 ochreous costal streak, becoming orange on costa, posteriorly 

 attenuated and not reaching apex ; cilia whitish-ochreous, 

 towards base orange. Hindwings light ochreous-yellow. 



Britain to Caledonian Canal, W. Ireland, common ; C. and 

 S. Europe, Asia Minor ; 7. Larva very dark grey, hairs black 

 and yellowish ; dorsal and subdorsal lines black ; spiracular 

 orange ; head black : on lichens, oak, Rhamnus, etc. ; 8-6. 



5. L. deplana, Esp. (helvola, Hb.) 28-32 mm. Head and 

 collar greyish-orange. Forewings of ochreous-grey, with a 

 subcostal orange suffusion towards base, costal edge posteriorly 

 and ciHa orange; of 9 yellowish-grey, with posteriorly attenu- 



