4 DILOBA C/ERULEOOEPHALA. 



of hawthorn leaves, so as to cover and almost hide the 

 cocoon. The moth, a female, emerged on the 26th of 

 October. 



The oblong cocoon when cut open was found to be 

 very tough and strong, white and smooth within. The 

 pupa of true Bombyx shape measured 7 lines in length 

 and of stout proportions, the abdominal tip furnished 

 with two lateral projections suggestive of the previous 

 anal prolegs, and each bearing several bristly hairs, 

 and traces yet remained, though minute, on other parts 

 of the former hairs of the tubercular warts ; the entire 

 surface of every part being very dull and rather rough, 

 while a band of stronger roughness, approaching almost 

 to thorny points, was on the middle of the back of each 

 abdominal segment. The colour was of a sooty brown- 

 ish-black or blackish-brown ; spiracles rather promi- 

 nent. (W. B., Note Book IV, 104.) 



Petasia nubeculosa. 



Plate XXXYI, fig. 3. 



On the 6th of May, 1881, I received from Mr. H. 

 Mc Arthur, while he was collecting at Rannoch, a dozen 

 eggs of this species, laid loose or on small morsels of 

 bark; of these two proved infertile, the first egg 

 hatched on May 16th being one I had previously sent 

 to the Rev. J. Hellins ; with me two were seen to be 

 hatched in the early morning of the 17th, two at mid- 

 night, three by next morning, one near midnight 

 following, and the last one by the morning of the 19th. 

 All my young larvae took to birch readily, but the one 

 in Mr. Hellins' care chose oak, and fed on it until its 

 third moult, and from that time, the 4th of June, it 

 would eat birch and not oak. After feeding their growth 

 was very perceptible, and when six days old they each 

 in turn lay up for moulting ; *this operation occurred 

 five times in all before their full growth was attained. 



