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The caterpillar is yellowish-grey, with a line of dark 
grey along the back, and a yellowish-white one on the 
sides. 
The date of the appearance of the caterpillar is in 
April and May. 
It feeds on the hedge wonnd-wort (Stachys sylvatica ). 
The chrysalis occurs beneath the ground. 
ACIDALIA. IMITARIA. 
SMALL BLOOD VEIN. 
PLate XXIY. Figure 10. 
This insect measures an inch or a little over in width. 
Male: fore wings dull reddish-yellow. The first line is 
pale grey and bent; second line also grey and waved; third 
line dark grey, slender and waved; central line dark 
blackish-grey, slanting inwards and followed by a lighter 
shade; central spot black but indistinct, and in some 
specimens not appearing at all. Hind wings with a 
double band before the central dot, and followed by 
another slender dark and waved streak; the fringe red. 
Localities for this species are York, Scarborough, 
Newnham, Humberstone, Barnstaple, Birkenhead, Lewes, 
Bristol, Cambridge, Brighton, Darlington, Lower Guiting, 
Manchester, Halton, Lyndhurst, Pembury, Stowmarket, 
Worthing, Tenterden, Exeter, Kingsbury. 
The perfect insect appears in July and the beginning 
of August. 
