SERICORID^—ORTHOT^NIA. 29 



and it ma}" be attracted by a strong light after dark. A 

 local species, but rather common in favoured spots ; found in 

 Surrey, Kent, Sussex, Middlesex, Dorset, Somerset, Glouces- 

 tershire, Herefordshire, Berks, Herts, Oxfordshire, Cam- 

 bridgeshire, Norfolk, and Suffolk. In Wales I found it 

 commonly in Pembrokeshire ; in Scotland Mr. K. J. Morton 

 secured it in Wigtownshire ; and in Ireland it is not rare 

 in the counties Dublin and Cork. Abroad it is known to 

 occur in German}^ and Finland, but it is usuall}' confounded 

 with the next species. 



6. O. rufana, Bco'p. — Expanse f inch (18 mm.). Fore 

 wings dull purple-brown or olive-brown, with darker dusting 

 but without definite markings. 



Antenna ciliated, dark brown ; j^alpi and head light 

 brown ; thorax umbreous ; abdomen rather long, grey- 

 brown. Fore wings broad, especially so behind ; costa very 

 slightly arched, apex bluntly angulated ; purplish-brown or 

 olive-brown, without distinct markings but rippled all over 

 with soft olive-brown lines, which sometimes thicken into a 

 faint central cloud ; cilia brown. Hind wings and their cilia 

 smoky brown. Female similar. 



Underside of the fore wings leaden-black ; costa and hind 

 margin whitish-brown. Hind wings leaden-white. 



On the wing in July and August. 



Larva apparently unknown — the published statements 

 quite unsatisfactory. 



Apparently first noticed in this country about the year 

 1863 in Westmoreland and North Lancashire. The captor, 

 the late Mr. J. E. Hodgkinson, stated that it appeared to be 

 most active at mid-day under a hot sun, and that the females 

 appeared in the proportion of about one in twenty. Probabl}^ it 

 is still to be found in that district, but I have no other records 

 in the United Kingdom. Its sliapc is so different from that 

 of the last named species that I feel sure of their distinctness. 



