6 
THERA VARIARIA. 
GREY CARPET. 
Plate XXXI. Figure 9. 
Localities for this abundant species are York, Brighton. 
West Wickham, Barnstaple, Arran, B/ack Park, Faver- 
sliam, Isle of Man. 
The perfect insect appears in June and September. 
The caterpillar is green, with a white line along the 
back ; the side line white. 
The date of the appearance of the caterpillar is in 
March, May, and July. 
It feeds on the fir. 
The chrysalis is found among leaves in a cocoon of silk. 
Here I must also thank Mr. J. H. Dossor, of York, 
THERA FIRMARIA. 
Plate XXXI. Figure 10. 
Localities for this species are York, Scarborough, 
Brighton, Wavendon, Paisley, Lyndhurst, Fort Augustus, 
Edinburgh, Sutherland, Manchester, Inverness, Golspie, 
Pembury, Exeter, Isle of Man, Ipswich, Birkenhead. 
The perfect insect appears in July. 
The caterpillar is dull green; the side line yellow, head 
brown. 
The date of the appearance of the caterpillar is in April. 
It feeds on the fir. 
The chrysalis is found in a cocoon of silk among leaves. 
I take this opportunity of thanking the Rev. G. Rud- 
ston Read, Rector of Sutton-on-Derwent, for much useful 
information. 
