EEEBIA OASSIOPE. 35 



dorsal streak is conspicuous on the thorax, and there is 

 the faintest possible indication of its being continued as 

 a stripe along the abdomen. The eye-, trunk-, antenna- 

 and leg-cases are margined with dark brown, and the 

 wing nervures are indicated by the same colour. The 

 surface is only slightly glistening. (W. B., MS. 2, 

 6, 75.) 



CcENONYMPHA DAVITS. 



Plate VI, fig. 3. 



On the 22nd of August, 1864, Mr. Newman kindly 

 sent me two young larvae of this species, which had 

 been bred from eggs obtained by Mr. Samuel Hudson,* 

 of Epworth, to whom I have been very greatly indebted 

 for information concerning them, and their locality, 

 and also for a plentiful supply of roots of their food- 

 plant, Bhynchospora alba (the beaked rush), which 

 kept alive through the winter, though the young larvae 

 did not survive. But again I was indebted to Mr. 

 Hudson, who sought for the larvae on the moors in 

 the early spring and replaced my loss, having found 

 several larvae feeding, one of which he once observed 

 to eat a little of Eriophorum (cotton-grass) ; but the 

 beaked rush is evidently its proper food, from the fact 

 of both larva and imago being always in the low-lying 

 boggy parts, where the beaked rush most abounds; 

 whereas in the higher commons, which are covered 

 with cotton grass, neither the larva nor the butterfly 

 has been seen. 



The habits of the larvae differ much from those of 

 the allied genera in being particularly active and lively, 

 travelling much over their food-plant, an allwise pro- 

 vision, enabling them to escape the inundations to 

 which they are liable. The larva does not change 

 much after the second moult, and when full grown, 



* Mr. Hudson described them as far as the second moult in the 

 ' Zoologist ' for 1864, p. 9252. 



