SELENIA] SELIDOSEMIDAE 283 



with purplish - bro wn ; costa more purple -whitish, its base 

 yellow mixed with ferruginous; first line curved, second straight, 

 subparallel, dark fuscous, stronger on costa ; median slightly 

 angulated, fuscous or dark ferruginous ; subterminal whitish 

 near costa, limiting ferruginous or ochreous apical patch ; ter- 

 men projecting in middle. Hind wings with ground as in fore- 

 wings ; median and second lines indistinct or obsolete, straight, 

 adjacent ; termen dentate. 



Britain to Caledonian Canal, N. Ireland, common ; N. and 

 C. Europe, N. Asia ; 3, 4, 7. Larva ochreous-brown or purplish- 

 brown, marked with yellowish ; subdorsal line pale ochreous ; 

 8 and 9 with pairs of red projections in ochreous marks; 13 

 with two projections : on blackthorn, hawthorn, etc. ; 5, 6, 8, 9. 



2. S. lunaria, Schiff. 38-42 mm. Differs from S. bilunaria 

 as follows : first and second lines of forewings not stronger on 

 costa, first more curved, second closely approximated to median 

 towards costa, enclosed narrow space ochreous or reddish- 

 ochreous, discal scar distinct : hindwings with median and 

 second lines as in forewings, discal scar blackish-edged. 



Britain to Ross, N. Ireland, rather common ; C. Europe ; 6. 

 Larva ochreous-brown, darker -marked; subdorsal line pale ; 5 

 with four projections, outer larger ; 6 with a bifid prominence, 

 white-edged in front; 9 and 10 with pairs of projections: on 

 blackthorn, oak, etc. ; 7, 8. 



3. S. tetralunaria, Hufn. (illustraria, Hb.) 32-44 mm. 

 Differs from S. bilunaria as follows : ground more brownish, 

 sometimes suffused with dark purplish -fuscous, part of costa 

 and a band beyond second line whitish-purple or whitish ; first 

 line more curved, second subsinuate, discal scar clear white ; 

 median and second lines in hindwiugs rather remote. 



England to Cheshire, Perth, not common ; C. Europe ; 5, 8. 

 Larva pale ochreous-brown, darker-marked ; 5, 6 with pairs of 

 small prominences ; 8, 9 swollen, each with four prominences ; 

 a dull orange band between 8 and 9; 13 with two points: on 

 hazel, birch, etc. ; 6, 9, 10. 



23. HYGROCHROA, Hb. 



Face with tuft of scales. Tongue developed. Antennae in 

 cf bipectinated to apex. Palpi rough-scaled. Thorax densely 

 hairy beneath. Femora densely hairy ; posterior tibiae in <$ 

 not dilated. Forewings in $ without fovea ; 10 sometimes out 

 of 9, sometimes connected with 11. 



There is but one species certainly referable here. 



