SERICORID.-E—ORTHOT^NIA. 23 



Pupa dull black ; in the larval habitation. 



The moth prefers to sit by day high up in an aspen or 

 poplar tree, and when disturbed will fly back to near the 

 same height so that it is difficult to secure ; at dusk it flies 

 wildly over the same trees. A local species, but rather 

 common where it occurs ; recorded from various parts of 

 Kent, Essex, and Suffolk ; also in Middlesex, Herts, Hants, 

 Herefordshire, and Worcestershire, rarely in Surrey and 

 Warwickshire, and near Sheffield, Yorkshire. Except that 

 Mr. A. Home, of Aberdeen, has a specimen which he took 

 himself at Collieston, on the east coast of Scotland, I know 

 of no other localities for it in these Islands. Abroad it 

 is found throughout Central Europe except in Holland; 

 also in North Italy, Scandinavia, Southern Siberia, and 

 Japan. 



2. O. antiquana, Hiib. — Expanse \ to \ inch (18- 

 22 mm.). Fore wings broad, especially so behind, pale 

 brown or dull brown, with a roughly trigonate central dark 

 cloud, towards which a pale dash points from the apex. 



Antennts ciliated, dark brown ; palpi, head, and thorax 

 dull brown ; abdomen pale brown. Fore wings broad, 

 especially so behind ; costa not folded, gently arched ; apex 

 sharply angulated and retuse ; pale brown-drab, or rosy 

 brown ; the dorsal area broadly plain, forming a unicolorous 

 pale stripe ; basal blotch faintly suggested by two or three 

 grey-brown dashes or dots ; central band by a sharply cut- 

 off trigonate black or brown blotch in the middle, having 

 above it a similar blotch on the costa ; a sharp cloudy black 

 shade edged by a very pale stripe runs between them into 

 the apex, across which runs a slender brown or black streak ; 

 cilia pale brown, dashed with black. Hind wings smoky 

 brown with paler cilia. Female similar or with fainter 

 markings. 



Underside of the fore wings smoky black ; costa and hind 

 margin narrowly pale brown. Hind wings leaden-white. 



