SERICORID(E—A CROLITA. 73 



but I have 110 personal acquaintance with it in its natural 

 haunts. These are on sandy flats near the sea where the 

 various spurges grow freely, but in these Islands it is only 

 known to be found in Hayling Island, Bournemouth, the 

 Isle of Portland and the Ohesil Beach in the counties of 

 Hants and Dorset. Abroad its range is on the coast of the 

 South of France, Spain, Sardinia, Sicily and the Canaries. 



2. A. servillana, Bvii. — Expanse i to | inch (12- 

 16 mm.). — Fore wings white with large blue-black or black- 

 brown clouds at the base and apex ; hind wings white in the 

 male, nearly black in the female. 



Antennae, palpi, head and thorax of male smoky black ; 

 abdomen silky black, white behind. Fore wings blunt, not 

 broad, costa faintly arched and without fold, apex bluntly 

 rounded ; white shaded with blue-black ; basal blotch large, 

 composed of lines of blue-black dusting, its outer edge 

 angnlated but not very clearly defined ; beyond is a small 

 cloud of black dusting on the costa, and a large one at the 

 anal angle ; hind marginal area striped with a dusting of 

 black and blue-black, in which is a row of deep black dots ; 

 cilia dull black. Hind wings white tipped with dark brown 

 dusting. Female similar but larger and having the hind 

 wings very dark smoky brown or smoky black, with white 

 cilia. 



Underside of the fore wings leaden black, sprinkled at 

 the hind margin with white. Hind -wings white. 



On the wing in ]\[ay and June. 



Larva cylindrical, moderately stout, tapering slightly 

 from the tenth segment ; pale grey changing to white with 

 a tinge of yellow when full grown ; raised dots conspicuous, 

 dark gre}^, from each of which springs a small white hair ; 

 head small, jet black and shining; doi-sal plate similar, 

 divided down the middle by a pale line ; legs and anal plate 



