80 



side. Hind wings pale grey, darker within the margin, 

 and with a narrow indented line across the middle. 



Female: fore wings brownish-grey, with a darker cross 

 indented band. Hind wings brownish grey. 



Localities for this species are York, Blandford, Carlisle, 

 Burton-on-Trent, Bedford, Epping, Lewisham, Worcester, 

 West Wickham, Derby, Rotherham, Dorchester, Ly- 

 mington, Ripon, Halton, Lewes, Darlington, Preston, 

 Bristol, Sheffield, Stowmarket, Wavendon. 



The situations where it is found are woods. 



The perfect insect appears in September. 



The caterpillar is bluish-black, with yellow hairs and 

 a yellow stripe on each side within two rows of raised 

 red spots, and also a row of white spots. 



The date of the appearance of the caterpillar is in 

 May and June. 



It feeds on the whitethorn, the blackthorn, and the 

 sallow. 



PIECILOCAMFA POPULI. 



DECEMBER MOTH. 

 Plate XIII. Figure 4. 



THIS insect measures from a little over one inch and 

 a quarter to nearly one inch and three quarters in width. 



Male: fore wings very dark purple-red brown, inclining 

 to orange at the inner corner, which colour is followed 

 by a waved line of buff, of which there is another curved 

 line across beyond the middle. Hind wings paler, with a 

 light coloured central stripe, and inclining to transparency. 



Localities for this species are Malton, York, Hudders- 

 field, Lewes, Kingsbury, Isle of Man, Halton, Wavendon, 



