266 LEPIDOPTERA. 



behind, at first broadly, then slants off to a point on the 

 lower side of the tenth ; the intermediate and remaining 

 segments freckled with greenish-grey, which on the middle 

 ones forms rather truncated diamond shapes; raised dots 

 white, more or less edged with black or grey ; from the 

 hinder proceed short, double but divergent, dark grey lines 

 to the back of the segments, most strongly defined on the 

 fifth and the last three; spiracles oval, dull red, outlined 

 with black ; fleshy filaments pearly-white ; anterior legs ex- 

 tending laterally, at right angles to the body, pale green, 

 ringed with dark greenish-grey ; ventral prolegs similarly 

 extended outwards, the first two pairs whitish-grey, the 

 third and fourth longer, grey in front, darker greenish-grey 

 and freckled behind, the anal pair similar in colour, extended 

 back at an obtuse angle ; ventral surface whitish with a 

 conspicuous blackish mark on the middle of each segment, 

 viz. a transverse bar between each pair of the anterior legs, 

 a rather large round spot on the fifth and sixth segments 

 and a very much larger spot each on the seventh to tenth, 

 thence smaller on each of the remaining segments — those on 

 the ninth and tenth of a transverse diamond form. The 

 skin of the head, back, and sides is rough, the undersurface 

 smoother, the filaments smooth. (Condensed from Mr. 

 Buckler's account.) 



End of April till June ; on oak, feeding upon the leaves, 

 except that when very young it bores into the buds of oak 

 and eats them out, more especially those which contain the 

 blossom ; feeding at night ; resting by day on the twigs or 

 branches, to which it bears an accurate resemblance. 



The winter is passed in the egg state. 



Pupa rounded and sloping smoothly to the head in a convex 

 curve ; behind, on the back of the abdomen, is a slight depres- 

 sion ; wing-covers smooth, and from them the abdomen is 

 full, but soon tapers rather sharply to the tip ; cremaster 

 rough, and furnished with several converging curly-topped 



