212 NOTODONTINA [HYDRIOMENA 



Britain to Ross, E. Ireland, common ; N., C., and SE. 

 Europe, WC. and N. Asia ; 7. Larva slender, green ; dorsal 

 line dark green, yellow -edged ; spiracular yellow; incisions 

 yellow : on Galium ; 4-6. 



8. H. picata, Hb. 28-31 mm. Forewings dull olive-green, 

 black -sprinkled, with black striae ; median band somewhat 

 darker, anterior edge curved, posterior with bicuspidate median 

 projection, followed by a clear white band, including a blackish 

 posterior stria ; subterminal line white, preceded by a blackish- 

 grey shade interrupted with white beneath costa ; a linear black 

 discal mark. Hindwings whitish, striated with grey, basal 

 third suffused with grey ; a darker discal dot. 



England to Leicester and Denbigh, rather common ; C. 

 Europe, WC. Asia ; 6, 7. Larva greenish -ochreous or flesh- 

 colour, reddish-marked ; a dorsal series of dark blotches, most 

 conspicuous on 7-9; spiracular line grey - speckled ; head 

 ochreous-brown, darker-marked : on Stellaria media (?) ; 8, 9. 



9. H. miata, L. 27-30 mm. Forewings dull green, some- 

 what whitish -mixed, with darker black -marked striae ; ante- 

 median and postmedian spaces whitish -striated ; edges of 

 median band irregularly sinuate ; subterminal line whitish ; a 

 darker discal mark. Hindwings greenish -grey- whitish, with 

 several greenish-grey striae ; a dark grey discal mark. 



Britain to the Orkneys, Ireland, common ; N. and C. Europe ; 

 9-5. Larva slender, pale yellow-green ; dorsal line dark green ; 

 spiracular rather darker yellow -green ; incisions yellowish; 

 spiracles white: 13 with two sometimes pink points: on oak, 

 Salix, birch, etc.; 6-8. 



10. H. siterata, Hufn. (psittacata, Schiff.) 27-30 mm. Differs 

 from H. miata as follows : forewings with two broad longitudinal 

 suffused fuscous streaks (appearing reddish-tinged by contrast) ; 

 hind wings brownish-grey, with several darker striae, and a dark 

 fuscous discal mark. 



England, Edinburgh, Ross, N. and E. Ireland, rather common ; 

 C. and SW. Europe, Asia Minor ; 9-4. Larva yellowish-green ; 

 sometimes a dorsal series of red blotches ; 1 3 with two some- 

 times rosy points : on oak, birch, etc. ; 6-8. 



11. H. sordidata, F. (elutata, Hb.) 27-33 mm. Forewings 

 dull olive -green, with darker or fuscous strigulae ; a fuscous 

 subbasal bar; five irregular rather dark fuscous fasciae, 

 obtusely angulated in or above middle, sometimes interrupted 

 or incomplete, fifth usually interrupted by a green-whitish spot 

 in middle ; median band and postmedian space sometimes 



