tSo- LEPIDOPTERA. 



Llack. Fore wings rather narrow, costa nearly straight, 

 apex bluntly angulated, hind margin rather straight ; dark 

 brown, much dusted with golden-yellow ; basal blotch 

 blackened towards its outer margin and there roughly angu- 

 lated ; close to it is a broad oblique creamy-white dorsal 

 blotch ; costa dotted alternately with black and white ; area 

 beyond the middle faintly striped with blue-black lines, and 

 variegated with short thick black streaks ; at the anal angle 

 is a small white patch, which also invades the, otherwise, 

 smoky-brown cilia. Hind wings smoky-black, with a broad 

 straight pearly white stripe from the base along the front 

 area. Eemale similar, except that the hind wings are wholly 

 smoky-brown. 



Undersides of all the wings leaden-black, each with a 

 leaden-white stripe down the middle ; costa of fore wings 

 broadly spotted with white ; cilia all white. 



Occasional specimens are found in which the dark markings 

 are almost obliterated and the fore wings almost wholly dirty 

 white. 



On the wing from April till the beginning of June. 

 Larva sluggish and stout, slightly attenuated behind, 

 segments wrinkled, semi-transparent, pinkish-white, mottled 

 with whiter ; raised dots reddish ; head shining brown ; 

 dorsal plate shining pale grey with a blackish hind border ; 

 on the back is a series of whitish bands having a faded 

 appearance. 



June, July, and the beginning of August, in the young 

 galls of oak, as in the last species, also feeding on the leaves 

 of apple. (Dr. J. H. Wood.) But it seems always to refuse 

 to eat oak-ZeaiJcs. When full fed it eats its way into bark, 

 rotten wood, or the dry galls of Cynips lignicola, but when 

 upon apple seems to content itself with the bark ; [making 

 in the hole which it has bored, a paper-like white cocoon in 

 which the winter is passed. 



The moth sits during the day in abundance upon the 



