i8o LEPIDOPTERA. 



lines. Spiracular line pale yellow or whitish, raised, and 

 very prominent on the second and third segments. Head 

 and legs dull whitish. Dorsal projection on the third segment 

 tipped with orange. (Fenn.) 



September to May or June, on Oak. 



The young larvje, from September to November, are green, 

 they then hybernate, and when they reappear in the early 

 spring are quite brown, and seem to gnaw the bark of the 

 young twigs. When the foliage appears they again become 

 green, and so continue to full growth. 



Pupa apparently undescribed ; in a boat-shaped cocoon on 

 oak. 



Mr. A. H. Swinton, in the Entomolofjist'' s Montldy 

 3fc(g((zinr, states that the pupa makes a rustling noise in its 

 cocoon, and also that the moth, after ejnergence, "makes a 

 membranous sound : first, when it expands its wings ; 

 secondly, when it flirts its partially-expanded wings ; and, 

 thirdly, on a still, sultry afternoon, a continuous rustling is 

 produced during flight. The spot whence proceeds the first 

 noise I am certain about .... When expanding the wings 

 I found that the inner margin of the fore wing caught a little 

 horny thoracic plate and left it with a jerk, which most 

 obviously produced the click." 



This species appears to be almost confined to oak woods 

 and oak trees near to woods. It flies at dusk, probably about 

 the trees, since it is seldom observed in flight ; but it is as fond 

 of "'sugar" as a Nodua, and is most frequently captured 

 by this means. Although certainly very local it is found in 

 oak woods in Kent, Sussex, Surrey, Hants, Berks, Hunts, 

 Herts, Middlesex; more commonly in Norfolk and Suffolk, 

 especially in the singular district of ancient sea-sand border- 

 ing those counties and Cambridgeshire ; also not scarce 

 in Essex. Very uncommon in Devon, Somerset and 

 Gloucestershire ; rare in Herefordshire and Worcestershire, 

 and apparently not recorded further north. In Ireland it 



