CATACLYSM?.] 



I1YDRI0MKN1DAE 



15, Cataclysms, lib. 



Face with somewhat projecting scales. Antennae in 3 cili- 

 ated. Palpi rough -scaled. Forewings: areole double, but 

 posterior wall absent between 7 

 and 8. Hindwings : 8 anastomos- 

 ing with cell to beyond middle. 



A small genus, attached to the 

 European region. 



1. C. virgata, liott. {lineolata, 

 Hb.) 19-22 mm. Forewings fus- 

 cous, densely whitish -sprinkled, Fonwtag of (***»»» ***. 

 with nearly straight darker striae; median band limited by 

 nearly straight slender oehreous-brown externally blackish- 

 edged fasciae, preceded and second followed by whitish streaks ; 

 a blackish discal dot. Hindwings light grey, with pale bent 

 postmedian and some darker striae. 



England to Lancashire, S. Ireland, local; 0. Europe, WU. 

 and N. Asia ; 5-7. Larva pinkish or brown ; dorsal line dark 

 green or brown ; subdorsal pale or yellowish ; spiracular blackish- 

 grey : on Galium verum ; 6-9. 



1G. Uydriomena, Hb. 

 Face with somewhat projecting or loose scales or conical 

 tuft. Antennae in $ ciliated, rarely 

 naked. Palpi rough -scaled. Abdo- 

 men sometimes crested on 2 basal 

 segments. Forewings : areole double. 

 Hindwings : 8 anastomosing with cell 

 to beyond middle. 



A very large genus, principally 

 characteristic of temperate regions in 

 both hemispheres; it is a develop- 

 ment from Xanthorhoe. 



1. Forewings yellow or orange 

 2. 



„ not vellow or orange 



4. 



2. Hindwings orange 36. bilineata. 



hmMon of IJydr^emjHcata. ^ pale yellowish 3. 



3. Cilia of forewings barred . . .6. fulvata. 



,, ,, not barred . . 7. dotata. 



4. Forewings green or olive-greenish . . 5. 



„ not greenish . . . .9. 



