434 PYRALIDINA [PLATYI>TILIA 



of terminal cilia white. Hindwings dark fuscous ; scale -tooth 

 moderate, beyond middle ; a small black apical scale-tooth. 



Britain to Koss, S. Ireland, common, less frequent north- 

 wards ; Europe, Asia Minor, N. America (?) ; 7, 9-5. Larva 

 from pale green to deep purple ; dorsal line dark grey ; sub- 

 dorsal, lateral, and sometimes spiracular whitish, interrupted ; 

 head yellowish -grey or yellowish -brown, blackish -marked : on 

 Stachys, Ononis, Geranium, etc. ; 6, 8. 



3. P. gonodactyla, Schi/. (trigonodactylus, Stt.) 20-26 mrn. 

 Forewings with termen markedly sinuate, light brown, 

 suffusedly strigulated with white ; costa dark brown, white- 

 dotted ; a dark reddish -fuscous posteriorly whitish - edged 

 triangular blotch on costa beyond middle ; a whitish sub- 

 terminal line across both segments ; apical f of terminal cilia 

 white. Hindwings dark fuscous; scale -tooth moderate, in 

 middle. 



Britain to the Orkneys, Ireland, common ; N. and C. Europe ; 

 6, 9. Larva green, grey, or whitish ; dorsal and subdorsal lines 

 dark red, sometimes very faint or obsolete, sometimes suffused : 

 in flower-heads and on leaves of Tussilago farfara ; 4, 5, 7, 8. 



4. P. Zetterstedtii, Z. (taeniadactyla, South) 19-22 mm. 

 Differs from P. gonodactyla as follows : forewings with termen 

 distinctly less sinuate, apical spot in cilia lighter and apex 

 appearing less falcate, colour rather darker and more ochreous- 

 tinged, less strigulated with white, especially posteriorly. 



Devon, Cornwall, local ; N. and C. Europe ; 6, 7. Larva in 

 stems of Senecio and Solidago ; 8, 9. 



5. P. isodactyla, Z. 21-23 mm. Forewings brown; costa 

 anteriorly dark fuscous, whitish - sprinkled ; a very ill-defined 

 dark fuscous triangular blotch on costa beyond middle, apex 

 forming a distinct dot ; faint traces of a pale subterminal line ; 

 apical f of terminal cilia white. Hindwings dark fuscous ; 

 scale-tooth moderate, in middle. 



Dorset and Devon to Pembroke, Suffolk, Norfolk, Ireland, 

 local ; C. Europe ; 6, 8, 9. Larva pale green ; dorsal line 

 darker ; subdorsal darker, whitish -edged above ; lateral and 

 spiracular faintly whitish ; head and tubercles black : in stems 

 of Senecio aquaticus ; 5, 7, 8. 



6. P. Bertram!, Rsl. 23-27 mm. Frontal tuft and palpi 

 very long Posterior tibiae below middle -spurs wholly light 

 brown. Forewings with apex subfalcate, ferruginous-ochreous, 

 clouded with yellow - whitish ; costal edge dark fuscous; a 

 darker triangular suffusion on costa beyond middle apex 



