220 NOTODONTINA [HYDRIOMENA 



Britain to the Clyde, Ireland, rather common ; Europe, WC. 

 Asia, N. Africa ; 6. Larva rather stout, pale greyish-ochreous, 

 sides black-dotted ; lateral, spiracular, and subspiracular lines 

 brownish -grey ; head and plate of 2 brown : on flowers and 

 seeds of Lychnis diurna ; 7, 8. 



34. H. albulata, Schiff. 20-22 mm. Forewings pale greyish- 

 ochreous, with grey or fuscous striae ; disc before middle some- 

 times suffused with whitish ; posterior edge of median band 

 obtusely prominent above and in middle, followed by two strong 

 white striae ; subterminal line white. Hindwings grey-whitish, 

 sometimes with indistinct grey striae, termen grey. 



Britain to the Shetlands, Ireland, common ; N. and C. 

 Europe, WC. Asia ; 5, 6. Larva dull greenish-yellow ; dorsal 

 line broad, darker green : spiracular narrow, darker green ; 

 head and plate of 2 brown : on seeds of Rhinanthus crista- 

 galli ; 7, 8. 



35. H. procellata, F. 30-34 mm. Forewings whitish, some- 

 times with partial grey striae ; subcostal vein ferruginous ; 

 basal patch dark fuscous, edge curved ; median band reduced 

 to a dark fuscous costal blotch ; fifth and sixth fasciae dark 

 fuscous, including a whitish median terminal blotch. Hind- 

 wings whitish, usually with indistinct grey striae ; a dark grey 

 discal dot ; termen suffused with fuscous. 



S. England to Leicester and Norfolk, rather local ; C. Europe, 

 N. and C. Asia, Japan ; 6, 7. Larva light brown, darker on 

 6-9 ; dorsal line black, reddish-marked, blotched on 6-9, pale- 

 edged ; subdorsal, lateral, and spiracular lines darker ; head 

 brown, black-marked : on Clematis ; 8, 9. 



36. H. bilineata, L. 23-28 mm. Forewings deep yellow or 

 orange, with fuscous striae; median band usually finely 

 whitish -edged, sometimes suffused with dark brown towards 

 edges, posterior edge prominent above and in middle ; a 

 fuscous discal mark. Hindwings orange, with fuscous striae ; 

 sometimes a whitish postmedian stria. 



Britain to the Shetlands, Ireland, abundant; Europe, W. 

 and N. Asia; 6, 7. Larva bluish - green ; dorsal line darker, 

 whitish-edged ; subdorsal and spiracular lines white : on grasses, 

 Rumex, etc.; 4 



37. H. fluviata, Hb. (gemmata, Hb.) 22-24 mm. Forewings 

 greyish-ochreous or greyish-purple, median area greyer, with 

 some faint darker striae ; edge of basal patch, posterior edge 

 of second and anterior edge of fifth fascia, and subterminal line 

 very finely whitish ; a dark discal dot in a pale or whitish ring ; 



