SERICORID.E—L IT HO GRA PHI A . 107 



This species loves to sit upon the trunks of aspens and 

 grey poplars (Popidus trcmula and P. canesccns), and if dis- 

 turbed in the daytime flies back to the same or another 

 trunk. Continental entomologists regard it as a form of 

 Z. nisrjla, and Professor Zeller told me that it is the more 

 common form abroad ; yet taking into consideration especi- 

 ally its greater length, and less breadth, of fore wings, the 

 decided difference in its colour and markings, and its 

 different habits, I feel satisfied that Haworth was justified 

 in describing it as a distinct species. It is unfortunate that 

 its name is misquoted by almost every writer who has noticed 

 it. With us it occurs, very locally, in Kent, Surrey, Hauls, 

 Dorset, Middlesex, Essex, Somerset, Gloucestershire, 

 Worcestershire, Lancashire, and Durham ; in Wales, in 

 Glamorganshire ; and in Scotland, much more plentifully, in 

 Perthshire and Aberdeenshire ; but in Ireland or abroad I 

 find no separate records. 



4. Li. penkleriana, Schiff. — Expanse h to ^ inch (12-16 

 mm.). Fore wings of even width, somewhat squared behind, 

 rich red-brown, with a large angular dorsal paler blotch, 

 which often is white. 



Antennse brown, whiter in front ; palpi, head, and thorax 

 dull red-brown ; abdomen smoky brown. Fore wings very 

 even in width, costa folded at the base and flatly arched, 

 apex squared ; red-brown, almost liver colour ; basal blotch 

 deeper red-brown, its outer margin straight and con- 

 spicuously erect but not attaining the costa ; the dorsal area 

 outside this is the palest portion of the wing, and often 

 forms a bright white squared blotch, yet is more frequently 

 of some shade of red ; hinder half of the wing deep red- 

 brown, with a faint pale streak toward the anal angle and 

 four geminated white dots upon the costa; cilia grey-brown, 

 with whitish dashes. Hind wings smoky brown ; cilia dull 

 white. Female similar, but without the costal fold. 



