LARENTin.E—CIDARIA. 259 



fore wings being white, with some little smoky clouding, but 

 bearing always the air of having had the central markings 

 rather roughly rubbed out, yet its outer partial or rijipled 

 stripes are intact, and sometimes emphasized. This form 

 was figured by Curtis as a distinct species under the name 

 of alborrevata ; in the collection of Mr. S. J. Capper are 

 specimens exactly intermediate between it and the type. 

 Mr. S. Webb has one of this variety in which the rippled 

 outer bands are glossy black, and very striking. Another 

 specimen in the same collection possesses the central band 

 in a pale and suffused form, and so joined to a very large 

 and equally pale basal lilotch that the usual interval is 

 diminished to two round white spots. 

 On the wing in June. 



Larva long and slender, rather cylindrical and nearly even 

 in thickness throughout ; bead bifid, green ; body pale green 

 or yellowish-green with greenish-yellow or whiter green 

 subdorsal stripes ; the dorsal line variously represented or 

 suggested ; on the third to the fifth segment, and again on 

 the eleventh to thirteenth is a dark red-brown or purple- 

 brown dorsal stripe, on the intermediate segments a slender 

 brown dash in the middle, another on the division, and on 

 each four brown dots ; or the purple-brciwn stripes are darker, 

 smaller and more oliscure, and the intermediate streaks 

 hardly visible, or on the other hand more expanded and 

 distinct ; spiracles white, sometimes ])laced in purple-ltrown 

 spots or hidden by broad smeared blotches of that colour, 

 which are sharply cut off at the back of each segment ; anal 

 point single, with the dark dorsal streak continued to its 

 tip ; undersurface sprinkled with brown dots ; legs and pro- 

 legs of the colour of the body. 



July till September or October; on birch, uak bhick- 

 thoru, lime and other deciduous trees. 



J'l'l'A yellow-brown, spotted with black, (lluruiann.) ]n 

 the earth. 



