50 
deep dull but rich ochreous-yellow. Hind wings of a 
similar colour but paler. 
Localities for this are Black Park,Leatherhead,Epping, 
Darenth Wood, Halton, Tonbridge, Horndean, Sudbury, 
Worcester, Bingley Wood near Oxford, Lewes, and 
Brighton. 
The perfect insect appears in June and July. 
The caterpillar is black, with two interrupted stripes 
of a yellow colour, spotted with red along the back; 
which is dotted with white behind the head, on the 
middle, and near the tail. 
The date of the appearance of the caterpillar is from 
May to June. 
It feeds on the lichens which grow on the fir and 
the pine. 
LITHOSIA PYGMiEOLA. 
Plate IX. Figure 8. 
This insect measures from a little under an inch to 
an inch in extent of width. Male: fore wings pale 
greyish-yellow, yellowish along the upper margin. Hind 
wings pale yellow, dark grey towards the upper margin. 
Localities for this species are on the coast near Deal. 
The perfect insect appears in August. 
LITHOSI A HELVEOLA. 
Pldte IX. Figure 9. 
This insect measures from a little over an inch to one 
and a quarter in width. Male: fore wings dull bluish- 
grey, buff-yellow at the base, the upper margin broadly 
