XANTHORHOE] HYDR10MENIDAE 231 



sixth fasciae faintly greyish. Hindwings whitish, with indis- 

 tinct grey striae ; a grey discal dot. 



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

 Europe, X. Asia ; 5, 6. Larva whitish-ochreous, on 7-9 brown ; 

 dorsal line dark brown, anteriorly with five pairs of blackish 

 spots, on 7-9 forming black spots in pale V-shaped marks ; sub- 

 dorsal brown, interrupted; spiracular pale: on grasses, Plantago, 

 Primula, etc. ; 9-4. 



15. X. fluctuata, L. 22-27 mm. Head dark fuscous, white- 

 mixed. Forewings ochreous-whitish, sometimes grey -sprinkled, 

 with grey striae ; basal patch dark fuscous or grey, edge 

 slightly curved ; median band obscurely grey, costal half more 

 or less wholly suffused with dark fuscous, anterior edge curved, 

 posterior angulated in middle ; a blackish discal mark ; a dark 

 fuscous praesubterminal costal spot ; fifth and sixth fasciae 

 more or less grey ; cilia distinctly barred. Hindwings greyish, 

 with pale and darker striae ; a dark grey discal dot. 



Britain to the Shetlands, Ireland, very common ; Europe, 

 WC. and N. Asia, N. Africa, N. America ; 4, 5, 8. Larva dull 

 reddish -ochreous, marked with dark grey; a dorsal series of 

 light patches, with blackish spots on 3-8 ; two pale lateral 

 stripes; a subspiracular row of five black spots: on cabbage 

 (Brassica) and horseradish (Raphanus) ; 6, 9. 



16. X. salicata, Nb. 26-28 mm. Forewings whitish, 

 sprinkled and striated with dark fuscous ; edges of median 

 band suffused with fuscous, darker-marked, anterior curved, 

 posterior obtusely angulated near costa and in middle, followed 

 by two clearer white striae ; a blackish discal mark ; veins 

 towards termen ochreous - tinged ; subterminal line white, 

 interrupted. Hindwings grey -whitish, with grey striae on 

 posterior half ; a grey discal dot. 



Devon, N. England to the Shetlands, Ireland, local ; C. and 

 SE. Europe, Asia Minor, Syria ; 6, 7. Larva dull brown ; sub- 

 dorsal and lateral lines whitish ; spiracular pale pinkish : on 

 Galium and Asperula, ; 9-4 (?). 



17. X. olivata, Bkh. 22-28 mm. Forewiugs olive -green, 

 with indistinct blackish striae ; basal patch and median band 

 somewhat darker, edges rather irregular, blackish, whitish- 

 margined, posterior edge of median band with a rounded double 

 projection in middle, followed by two white striae; a blackish 

 discal dot; subterminal line white, interrupted, preceded by 

 blackish spots above middle. Hindwings grey, with pale 

 double postmedian and subterminal lines ; a darker discal dot, 



