SERICORrD.-E—PENT/Ih\A. 371 



costa gently arched, apex bluntly anwulated, liintl margin 

 almost straig-ht ; soft delicate pink ; basal blotch dark slate- 

 grey, large and oblique, its outer edge rugged and dotted 

 with black : central band mottled, slate-black and dark 

 brown, broad on the dorsal margin, and often united with 

 the basal blotch by dark clouding aloogthe median nervure : 

 outside this is a round black dot; hinder area faintly mottled 

 with pale brown clouds ; cilia smoky pink. Hind wings and 

 their cilia smoky brown. Female similar or a little more 

 brilliant in colour. 



Underside of the fore wings leaden brown ; costa and 

 hind margin shaded paler. Hind wings leaden white. 



The delicate pink colour readily fades towards white during 

 life, from exposure to sun and moisture. 



On the wing in June. 



Larva short, stout and wrinkled; slightly tapering at the 

 extremities, but otherwise cylindrical ; not active ; dark 

 smoky grey or smoky black ; raised dots large, jet black. 

 with rather long bi'istles ; head, plates, and feet shining 

 black. 



August and September on Myricu gnlc (bog myrtle or 

 sweet gale) joining together the edges of the leaves on a 

 shoot so as to make a i-ound balloon-shaped habitation ; 

 eating out the heart of the shoot and gnawing the upper 

 surface of the joined leaves. This balloon-shaped habitation 

 is exactly like that formed by the larva of MclanipiK liastvto 

 upon the same bushes, but is far more plentiful than it, 

 there being sometimes in Scotland a larva upon every plant. 



The late Mr. H. Doubleday informed me that it used to be 

 found feeding upon sallow in Epping Forest. The winter is 

 passed in the pupa state. 



Usually a northern species, yet found rarely in the south ; 

 the Rev. E. N. Bloomfield and Mr. W. H. B. Fletcher both 

 record it in Sussex ; the late Mr. Parfitt in Devon ; and, as 

 just remarked, Mi. Doubleday in Essex. 1 know of no other 



