138 LEPTDOPTERA. 



deep transverse wrinkles. Head small, rounded, green, in- 

 side edges of the- lobes marked with yellowish ; body bright 

 yellowish-green, nndersurface flattened, darker green ; dorsal 

 line indistinctly darker green ; spiracular stripe broad, con- 

 spicuous, yellow, containing a pink spot on each segment 

 and edged above with darker green ; spiracles black ; legs 

 and prolegs green. (C. Fenn.) When younger similar in 

 colour and markings but more cylindrical. 



May and June on birch, usually in shady places, rather 

 avoiding the light. When young it keeps to the underside 

 of the leaf sitting along the midrib. 



Pupa elongate, incisions deeply cleft ; anal segment round, 

 smooth, without projections. Very dark purplish-brown. In 

 a moderately strong compact cocoon, of silk and sand, under 

 moss, or beneath the surface of the ground. (C. Fenn.) 



In this condition through the winter. 



The moth flies at night but very little is known of its 

 habits, since it is scarcely ever observed on the wing. It 

 emerges from pupa in the morning, and usually sits during 

 the day not far from the ground on a birch trunk or on a 

 neighbouring paling, generally in a shady sheltered place, 

 but is always very scarce, even in its few favoured localities. 

 The vast majority of specimens in cabinets haVe been reared 

 from the Q^g. Formerly found at Birch Wood, Surrey, and 

 Darenth Wood, Kent ; and more frequently at West Wickhani 

 Wood in the latter county, where it still lingers. I have 

 taken it near Haslemei-e in the extreme south of Surrey, and 

 other captures are on record in Sussex, the New Forest, 

 Hants, and in Berks, as well as a single larva in Suffolk. 

 But it may reasonably be expected to occur in any district of 

 the South of England in which birch is abundant, as it is 

 very easily overlooked, the moth being wouderfully like a 

 broken slice of the birch bark. It appears to occur regularly, 

 though rarely, at Keswick, Cumberland, but I know of no 

 intermediate locality. In Scotland, Mr. P. Cameron has 



