no THE MOTHS OF THE BRITISH ISLES. 



and was figured and described in The Entomologists A7imial 

 for 1856 as Dosithea eburnata^ Wocke. About seven years 

 later Greening captured a female specimen, and he subsequently 

 reared the insect, when it became known as " Greening's Pug." 

 Still later, about 1875, the English name was changed to 

 " Capper's Acidalia." 



Fortunately, the species seems not difficult to rear from the 

 t,%%^ otherwise specimens in collections would be not only very 

 limited in number, but frequently very indifferent in condition. 



In colour the moth is whity brown, more or less dusted or 

 clouded with dark grey ; except in the darker forms, three 

 irregular black lines on the fore wings, and two on the hind 

 wings, are clearly seen. It flies at dusk in June and July, and 

 sits by day on lichen- covered rocks. 



The caterpillar is pale ochreous brown, with irregular dark 

 brown lines. It feeds on ling {Callutia) and crowberry 

 {Empetriim) from September to May ; but when eggs are 

 obtained, the caterpillar hatching from them may be kept 

 on chickweed, knotgrass, etc., and the moth be reared the 

 same year. 



Mr. R. Tait records the finding of ten caterpillars on navel- 

 wort {Cotyledon) growing among heather in a very sheltered 

 corner among rocks in North Wales, at Easter, 1906. He 

 also notes that moths reared in captivity pair readily. 



The British localities, all in North Wales, are Aber, Bangor, 

 Barmouth, Bettws-y-coed, Conway, Dolgelly, Lanfairfechan, 

 and Penmaenmawr. 



The Least Carpet (Acidalia {Ptychopoda) rusticata). 



The whitish fore wings of this species (Plate 45, Figs. 3 and 6) 

 are crossed by a blackish central band, and there is a blackish 

 patch at the base of the wings, with an extension along the 

 front margin, almost or quite to the central band; the hind 



