ACIDALIID.-E—ACinAI.IA. u 



collections without definite ant] reliable history. It is certain, 

 however, that in the year 18G5 a specimen was captured at 

 Eedhill, Surrey, by ]\Ir. Sydney Webb, in whose possession 

 it still is ; and that another was taken in the same place, 

 four years later, by the late 3Ir. Walter Weston. I know of 

 no other certain locality in which this species has been taken 

 in the Ih'itish Isles. Abroad it is found in many ])arts of 

 Southern Europe, including the South of Spain ; also in the 

 temperate regions of Northern Europe; in Xorthern Italy, 

 Corsica, the Balkan States, Bithynia, Southern Russia, and 

 Eastern Siberia. 



I. P. scutulata, ScJiijI'.; diniidiata, Stmnl. Cct. — 

 Expanse ;; inch. Wings thin and silky, much rounded, 

 brownish-white with slender transverse lines ; over the anal 

 angle of the fore wings is a large smokj--black cloudy blotch, 

 or cluster of spots. 



Antennif of the male short, sharply notched, ciliated with 

 distinct tufts of minute bristles like tin_y pectinations, 

 bruwnish-white ; palpi very small, light brown ; pyes black; 

 face convex, blackish-chocolate, edged above by a deep trans- 

 verse channel ; top of head white ; neck-ridge distinct, pale 

 brown ; thorax very slender and weak, brownish-white ; 

 abdomen shining white, dusted with brown; lateral tufts 

 distinct ; anal tuft narrow. Fore wings very thin, silky, 

 blunt; costa gently arched ; apex bluntly angulated. almost 

 rounded ; hind margin much rounded, so as to run smoothly 

 round the anal angle, and into the dorsal margin, which is 

 strongly ciliated ; brownish-white faintly tinged with smoky- 

 brown along the costa and hind margin ; first line slender 

 and fapint, oblique and more marked upon the costal margin, 

 brown ; second line a slender blackish-brown thread, erect, 

 twice curved, more distinct toward the costal and dorsal 

 margins, and dotted upon every nervure ; just before it is 

 the central lim-. less distinct but more obli(ju.e, a smoky- 

 brown thread, curved above the middle; discal spot a small 



