momma] CARADRINIDAE 73 



dorsal formed of pale dots ; head green : on oak, poplar, haw- 

 thorn, etc. ; 5-7. 



2. M. opima, lib. 34-37 mm. Antennae in £ bidentate. 

 ForewingB grey, brownish-tinged, median area darker and more 

 brownish ; first and second lines brown, indistinct ; median 

 shade suffused, brown ; orbicular and reniform outlined with 

 pale ; subterminal line ochreous-whitish, nearly straight, an- 

 teriorly dark-edged. Hindwings fuscous or whitish-fuscous. 



Sussex, W. and N. England from Somerset, S. Ireland, 

 local ; C. Europe ; 3, 4. Larva dull olive-green to red-brown, 

 darker-freckled ; dorsal and subdorsal lines paler ; spiracular 

 yellow or yellowish-green, dark-margined above; head brownish : 

 on Salix and rose ; 5, 6. 



3. M. gracilis, F. 35-40 mm. Antennae in g bidentate. 

 Forewings light grey, more or less suffused with light reddish- 

 ochreous, especially in disc, with some black scales; first and 

 second lines usually faintly darker, marked with black dots ; 

 orbicular and reniform outlined with pale, lower end of reniform 

 darker; subterminal line pale reddish-ochreous, nearly straight. 

 Hindwings whitish-fuscous, basally whiter; discal spot and a 

 postmedian series of elongate dots dark fuscous. 



Britain to the Clyde, Ireland, rather local ; C. Europe ; 4, 

 5. Larva dull-green or pinkish-brown ; dorsal and subdorsal 

 lines paler ; spiracular pale greenish or seldom pinkish, edged 

 above with dark grey or blackish ; head pale brown or 

 greenish : on Salix, Gdrduus, Lysimachia, etc. ; 5-7. 



4. M. stabilis, View. 31-35 mm. Antennae in <J bipectinated. 

 Forewings light greyish-ochreous, sprinkled or suffused with grey, 

 sometimes suffused with light reddish-ochreous, veins posteriorly 

 pale ; first and second lines faintly darker ; median shade darker 

 grey ; orbicular and reniform outlined with pale, sometimes 

 touching, reniform usually darker ; subterminal line ochreous- 

 whitish, nearly straight. Hindwings grey. 



Britain to Ross, Ireland, abundant ; C. and S. Europe ; 3, 4. 

 Larva green, with numerous yellow-whitish dots ; dorsal, sub- 

 dorsal, and spiracular lines yellow-whitish, sometimes very 

 indistinct ; anterior edge of 2 and posterior of 12 yellow-whitish; 

 head green, sometimes black-dotted : on elm, oak, Salix, 

 etc. ; 5-7. 



5. M. populeti, Tr. 33-35 mm. Antennae in (J bipectinated. 

 Forewings brown-grey, slightly purplish-tinged ; first, median, 

 and second lines somewhat darker, especially on costa ; orbicular 

 and reniform darker, outlined with pale ; subterminal line pale 



