284 LEPIDOPTERA. 



rather local. Originally recognised as a good species from 

 specimens taken on the cliffs at the Hill of Howth near 

 Dublin. Previously confounded with E. duhitana. To be 

 found on the coasts of Kent, Sussex, Dorset, and Cornwall, 

 and more inland, on the chalk, in Surrey; also near Yarmouth, 

 Norfolk, in Cheshire, and in the Isle of Man. In Wales in 

 Pembrokeshire ; in Scotland in Ayrshire ; and in Ireland on 

 the Dublin coast, as already remarked, and in Cork and 

 Derry. Abroad it inhabits Central Europe, Piedmont, 

 Sweden, Livouia, and Bithynia. 



3. E. dubitana, /r»/).— Expanse § to I inch (10-12 mm.). 

 Face and palpi white ; fore wings white with black markings 

 and apex. 



Antennre dark brown, thickly ciliated ; palpi and face 

 white or yellowish-white; thorax and abdomen sooty-black. 

 Fore wings rather narrow, the costaand nervures thickened ; 

 creamy-white ; basal blotch small, black ; central band re- 

 presented by a squared dorsal black blotch and a small costal 

 black spot ; costa minutely dotted with black ; apex and 

 hiud margin clouded with blue-black, cilia the same. Hind 

 wings smoky white or jjale smoke-colour, with cilia the 

 same. Female similar. 



Underside of the fore wings smoky-black, rather glossy ; 

 tip of the costa dotted with white. Hind wings smoky 

 white. 



On the wing in ^lay and June, and as a second generation 

 in August. 



Larva not active ; very plump, glossy, with delicate hairs 

 whitish till full fed, then tinged with pink ; head pale 

 chestnut : plates both honey-yellow, the dorsal being 

 divided and also edged behind with black ; raised dots, legs, 

 and prolegs of the colour of the bodj'. When quite young 

 its whitish colour is tinged with grey ; the dorsal vessel 

 darker and the dorsal plate blacker. 



June and July, and a second generation in September, on 



