50 



deep dull but rich ochrcous-ycllow. Hind wings of a 

 similar colour but paler. 



Localities for this are Black Park, Leathcrhead, Epping, 

 Daren th 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 PYGMJEOLA. 

 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. 



LITHOSIA HELVEOLA. 

 Plate 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 



