30 LEPIDOPTERA. 



apart from the very different range of colour. Abroad it is 

 said to be common throughout Central and Northern Europe, 

 Central and North Italy, Dalmatia and Norway, but doubt- 

 less these records include 0. purpurana. 



7. O. arbutella, Linn. — Expanse -J inch (12 mm.). A 

 small species — fore wings rich purple-red with several 

 irreo-ular steel-blue transverse lines. 



Antennae ciliated, black-brown ; palpi dull black ; head 

 and thorax purple-red ; abdomen black- brown. Fore wings 

 narrow, costa but little arched, apex blunt ; rich dark red 

 or purple-red ; crossed everywhere by slender, irregular, 

 silvery or steel-blue lines and without other definite mark- 

 ings ; cilia dull red. Hind wings and their cilia smoky 

 brown. Female similar. 



Underside of fore wings smoky black, of the hind wings 

 pale lead colour. 



On the wing at the end of May and through June. 



Larva grey-brown or blackish, slightly hairy ; head 

 black ; dorsal plate pale brown. 



May, on Ardostajjhylos uva-nrsi, among the spun-together 

 terminal leaves, eating out the heart of the shoot. It is 

 elsewhere stated that the larva feeds in August, but this 

 requires confirmation, and also some indication as to whether 

 it refers to a second brood or to the young larva before 

 hybernation. 



Pupa undescribed — in the larval habitation. 



The moth is said to fly in the afternoon sunshine ; it is 

 apparently found exclusively on the higher parts of moun- 

 tains where its food-plant grows in sheltered hollows, and is 

 very local. So far as I am awai'e, we have it only on moun- 

 tains in Scotland, especially those of Perthshire and Aber- 

 deenshire, but probably further investigation is desirable. 

 Abroad it is found on the mountains of Southern France, 



