542 TORTRICINA [TORTRIX 



costa brownish. Hindwings whitish -ochreous, more or less 

 tinged or suffused with grey, 6 and 7 stalked. 



England to York, S. Ireland, local ; Holland, S. Europe, 

 Canary Islands ; 7. Larva pale yellowish ; dorsal and sub- 

 dorsal lines greenish -grey ; spots black ; head and plate of 2 

 pale brown : on flowers of Hypochoeris, Anthemis, Aster, etc. ; 

 5, 6. 



28. T. argentana, Cl. 20-25 mm. Fore wings elongate, 

 narrowed anteriorly, costa hardly arched, termen slightly 

 sinuate ; silvery white ; costal edge ochreous -tinged. Hind- 

 wings grey-whitish. 



Perth, local, on mountains ; C. and SW. Europe, N. America ; 

 7. 



29. T. osseana, Sc. (pratana, Hb.) 19-23 mm. Forewings 

 very elongate, costa almost straight, termen slightly sinuate ; 

 brownish-ochreous, sometimes ferruginous-tinged, seldom whit- 

 ish -ochreous ; an irregular spot in disc before and another 

 beyond middle, and a triangular apical patch fuscous, often 

 indistinct or sometimes obsolete. Hindwings grey. 



Britain to the Shetlands, Ireland, locally plentiful, on 

 downs, etc. ; N. and C. Europe, N. America ; 7, 8. 



10. ISOTRIAS, n.g. 



Antennae in $ shortly ciliated. Palpi moderately long, 

 subascending. Thorax with small pos- 

 terior crest. Forewings without costal 

 fold ; 7 to apex. Hindwings : 3 and 4 

 stalked, 5 parallel to 4, 6 and 7 remote 

 at origin. 



Includes only the single species. 

 Hindwing of isotrias 1. I. hybridana, Hb. (J 15-16 mm., $ 



11-12 mm. Forewings white or whitish, 



strigulated with brown, on costa with dark fuscous ; basal patch, 

 somewhat angulated but hardly oblique central fascia, subapical 

 fascia, and small tornal spot brown strigulated with black. 

 Hindwings grey. 



England to York, Argyll, E. Ireland, common ; C. Europe ; 

 5,6. 



11. EXAPATE, lib. 



Tongue absent. Antennae in moderately ciliated. Palpi 

 short, porrected. Thorax with posterior crest. Forewings : 7 

 to termen or apex. Hindwings : 3 and 4 rather approximated 



