156 BRITISH BUTTEEFLIES AND MOTHS 



are of a deep yellow, with two conspicuous black spots 

 beyond the middle. 



The larva is of a blackish-grey, with a double, in- 

 dented yellow line on each side of the back ; along this 

 line are placed scarlet hairy warts ; on the second, 

 seventh, and last segments are black spots ; it feeds on 

 lichens growing on the trunks of oak, beech, etc., in 

 May and June. 



The perfect insect makes its appearance in July. 



FAMILY Y. LITHOSIM:. 



GNOPHRIA RUBRIC OLLIS. THE BLACK 

 FOOTMAN. 



A very abundant species throughout the country, and 

 occurring north at any rate as far as Dumfriesshire. 



Expansion of the wings 1 inch to 1J inch. All the 

 wings are of a uniform dull, smoky black ; the abdomen 

 is black, except the four or five last segments, which are 

 yellow ; but the character from which it takes its specific 

 name is the red colour of the front portion of the thorax, 

 which is otherwise black. 



The larva is of a greenish- grey, streaked and spotted 

 with black ; the tubercles are reddish ; the head is black, 

 with two white lunate marks. It feeds on various 

 lichens, especially those on the trunks of beech-trees, in 

 the autumn. 



The perfect insect makes its appearance at the end of 

 May and beginning of June. 



FAMILY V. LITHOSID.E. 

 PHILEA IRRORELLA. THE DEW MOTH. 



This delicately pretty species is not uncommon in 



