200 THE MOTHS OF THE BRITISH ISLES. 



It feeds from July to September on the leaves of reeds, at 

 night ; hiding by day under leaves low down. The moth is out 

 in June, but an autumn brood is sometimes obtained. It only 

 occurs in fenland, chiefly Norfolk and Cambridgeshire. 



The Marbled Beauty {Bryophila perld). 



Typically the fore wings of this species are white, marbled 

 with slaty grey, and with the stigmata dark grey (Plate 103, 

 Figs. 9$, 12$). There is less colour variation than in the 

 last species, but in some localities greenish, ochreous, and 

 ochreous brown forms have been obtained. The caterpillar 

 is pale slaty grey, with an irregular yellowish stripe on the 

 back, with black spots forming a central line ; the raised 

 spots are black and shiny, as also is the head. Feeds on 

 lichens growing on old walls from August to May. The 

 moth, which occurs throughout England, Wales, Ireland, and 

 Scotland up to the Clyde, is to be found, commonly as a rule, 

 on walls by day, and gas lamps at night, in July and August. 

 Sometimes I have found specimens on tree trunks. 



Marbled Green {Bryophila muralls {glandifera)). 



Two forms of this very variable little moth are represented on 

 Plate 103, Figs. 8 J (typical), 11 $. The ground colour of the 

 fore wings ranges from almost white through pale green to 

 bluish green or to a deep olive green, or through pale ochreous 

 to orange browii. The markings, too, vary in intensity, and 

 are sometimes very obscure. Several forms have been named, 

 but only the Cambridge race, known as var. hnpar, Warren, 

 can here be referred to. In this form the colour is more often 

 greyish or brownish white, than green ; the markings are 

 cloudy and not clearly defined. 



The caterpillar is obscure greenish, with whitish and rather 



