PLATYPTILIA! PTEROPHORIDAE 433 



scaled, terminal filiform. Tibiae simple or somewhat tufted on 

 centre of middle tibiae and origin of spurs. Forewings cleft 

 from f-f ; 8 and 9 stalked, 11 remote. Hindwings trifid, third 

 segment with strong black scale-tooth in dorsal cilia. 



A considerable genus, quite cosmopolitan ; a development of 

 Stenoptilia. 



1. Scale-tooth of hind wings in middle of dorsum . 2. 



much beyond middle 6. 



2. Palpi and frontal tuft very long . . .3. 



moderate . . .4. 



3. Posterior tibiae below middle-spurs wholly brown 



6. Bertrami. 

 with white band 



7. ochrodactyla. 



4. Costal triangular spot sharply defined . . 5. 



,, ,, very ill-defined . 5. isodactyla. 



5. Apex of forewings appearing subfalcate . 3. gonodactyla. 



hardly sinuate . 4. Zetterstedtii. 



6. Hindwiugs with postmedian and small apical scale- 



teeth . . . .7. 



with large apical scale- tooth only 



8. rhododactyla. 



7. Forewings reddish-fuscous . 2. acanthodactyla. 



pale greyish-ochreous marked with black 



1. cosmodactyla. 



1. P. cosmodactyla, lib. (punctidactyla, Hw.) 18-21 mm. 

 Forewings pale greyish-ochreous closely striated with black ; a 

 triangular black blotch on costa beyond middle, followed by a 

 small white costal spot ; a black subterminal bar on segments, 

 posteriorly finely whitish - edged ; apical f of terminal cilia 

 white. Hindwings blackish ; scale -tooth very large, much 

 beyond middle, edged by whitish spaces ; a small black apical 

 scale-tooth. 



England, Argyll, S. Ireland, local ; N. and C. Europe ; 7, 

 9-5. Larva from pale green to purplish-pink ; dorsal line dark 

 grey ; subdorsal white, conspicuous ; lateral and spiracular 

 whitish, interrupted ; head dark reddish-fuscous, almost black : 

 on Stachys, Aquilegia, Geranium, etc. ; 6, 8. 



2. P. acanthodactyla, Hb. 18-21 mm. Forewings reddish- 

 fuscous, costa marked with dark fuscous, sometimes white- 

 dotted ; a dark fuscous triangular blotch on costa beyond 

 middle, usually followed by a white costal dash ; a dark fuscous 

 subterminal bar on segments, posteriorly white-edged ; apical | 



2 F 



