HYDRIOMENA] HYDRIOMENIDAE 211 



marked on veins, edges blackish, whitish-margined, dentate, 

 anterior dentate-angulated in middle, posterior acutely angu- 

 lated above middle ; a blackish discal dot ; subterminal line 

 obscurely whitish ; a dark fuscous apical dash. Hindwings 

 pale fuscous; a darker discal dot and curved postmedian 

 line. 



Surrey, Hants, Suffolk, Scotland to Ross, local ; C. Europe ; 

 10. Larva blue-green ; subdorsal line broad, yellow ; spiracular 

 purple-brown above, white below ; spiracles yellow : on Juni- 

 perus ; 7-9. 



5. H. sagittate, F. 24-27 mm. Head brownish -ochreous, 

 fillet white, face black. Forewings brown ; a blackish almost 

 basal fascia, posterior edge white -margined, angulated near 

 dorsum ; median band blackish, white-margined, anterior edge 

 curved, posterior with strong narrow sharp median projection ; 

 subterminal line obscure, forming white marks on costa and 

 middle of termen; cilia barred. Hindwings brownish-grey ; a 

 darker discal dot and postmedian line. 



Suffolk and Norfolk to Northampton, local; C. Europe; 7. 

 Larva stout, deeply incised, 5-10 more swollen ; varying from 

 pale blue-green to bright y ellow -green ; 2-4 each with two 

 dark dorsal blotches ; 5-10 with dark green transverse bands, 

 forming lateral blotches, sometimes rose-pink, black-edged be- 

 neath : on seeds of Thalictrum flavum ; 8, 9. 



6. H. fulvata, Forst. 22-25 mm. Forewings bright deep 

 yellow ; basal patch ferruginous-striated, edge curved ; median 

 band ferruginous, suffused with dark fuscous towards disc, with 

 a costal yellow blotch, edges dark fuscous, anterior irregular, 

 posterior pale-margined, with truncate median projection ; a 

 triangular whitish -ochreous apical spot, edged beneath with 

 dark fuscous and a ferruginous suffusion ; cilia barred. Hind- 

 wings pale whitish-yellowish. 



Britain to the Orkneys, Ireland, common ; C. Europe, W. 

 Asia ; 7. Larva green ; dorsal line greenish-grey, double ; sub- 

 dorsal greenish-grey ; spiracular yellow ; incisions yellow : on 

 rose ; 5, 6. 



7. H. dotata, L. (pyraliata, F.) 30-35 mm. Forewings 

 ochreous -yellow ; costa dark fuscous towards base ; edges of 

 basal patch and median band dark fuscous, angulated above 

 middle ; sometimes a fuscous discal dot ; praesub terminal line 

 cloudy, fuscous, interrupted ; a cloudy fuscous apical dash ; 

 cilia dark fuscous except towards tornus. Hindwings pale 

 yellowish ; a pale grey discal dot and small tornal spot. 



