AVKNTIA] PLUSIADAE 153 



Antennae in $ ciliated. Palpi moderate, porrected, second 

 joint thickened with dense scales, terminal very short, obtuse. 

 Thorax smooth-scaled. Abdomen not crested. Tibiae loosely 

 haired. Hind wings : 5 parallel to 4. 



Includes only the single species. Imago with upper half of 

 tertnen of forewings rather abruptly concave. Larva with 

 prolegs on 7 and 8 much shorter ; a subspiracular ridge bearing 

 fleshy filaments. 



1. A. flexula, Schif. 25-32 mm. Head and collar light 

 yellow-brown. Forewings rosy -grey -whitish, sprinkled with 

 black ; first and second lines whitish-ochreous, edged on both 

 sides with brown, angulated near costa ; reniform represented 

 by two black dots transversely placed ; subterminal line ob- 

 scurely pale ; a pale ferruginous terminal suffusion, becoming 

 deeper on upper half of termen, leaving a small whitish apical 

 suffusion ; a blackish apical spot in cilia. Hind wings ochreous- 

 whitish, blackish-sprinkled ; second line fuscous-edged, straight. 



England to York, local ; G. Europe ; 6, 7. Larva pale 

 bluish-green, sometimes ochreous-tinged ; dorsal line darker 

 green, black-edged near incisions ; subdorsal pale, edged above 

 with black, below with darker green ; 9 and 10 darker ; dots 

 black ; head whitish-green, black-dotted : on lichens 011 tree- 

 trunks; 4, 5. 



Sub-Fam. 2. PLUSIADES. 



Vein 5 of hindwings more or less approximated to 4. 



10. OPHIUSA, 0. 



Head rough -scaled, with frontal tuft. Antennae in <$ 

 ciliated. Palpi moderate, ascending, rough -scaled beneath 

 throughout, terminal joint short, obtuse. Thorax with anterior 

 crest. Abdomen not crested. Tibiae rough-scaled. Hind- 

 wings : 5 somewhat approximated to 4. 



A rather limited genus, occurring throughout the northern 

 hemisphere and in Australia. Larva with prolegs on 7 and 8 

 somewhat shorter. Pupa in a cocoon. 



Costa with several dark brown spots . 2. craccae. 



not spotted . . . .1. pastinum. 



1. 0. pastinum, Tr. 37-43 mm. Head above and collar 



deep brown. Forewings pale fuscous, tinged with ochreous- 



brown especially on costa and terminal area, and indistinctly 



strigulated with darker; first and second lines indistinctly 



