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LITHOSIA COMPLANA. 
Plate IX. Figure 11. 
This insect measures an inch and a quarter, or a little 
over, in expanse. Male : fore wings pale bluish-grey, 
with a stripe of buff-yellow of equal width along the 
upper margin. 
Localities for this species are Black Park, Deal, Dover, 
Lewes, Worthing, Bisterne, Shrewsbury, Chat-Moss, 
Manchester, Bristol, Plymouth, Epping, and Stowmarket, 
College Wood, and Pennance near Falmouth, &c., &c. 
The perfect insect appears in July. 
The caterpillar is black, covered with short hairs. 
There is a spotted stripe of yellow, red, and white, on 
each side of the back, and another narrow one of reddish 
yellow above the feet. 
The date of the appearance of the caterpillar is in 
May and June. 
It feeds on the lichens which grow on the sloe or 
wild plum, and the fir. 
LITHOSIA GRISEOLA. 
Plate IX. Figure 12. 
This insect measures from about an inch and a quarter, 
or a little over, to nearly an inch and a half across. 
Male: fore wings pale grey inclining to buff, and of a 
glossy appearance ; the upper margin narrowly marked 
with yellowish. Hind wings yellowish grey. 
Localities for this species are Scarborough, Bisterne, 
Kingsbury, Dorking, Halton, Bognor, Bipley, Wavendon, 
