52 LEPIDOPTERA. 



nearly to the apex, and Mr. S. Stevens a gynandro- 

 morphous example in whicli the right side is male. 

 July and August. 



Laeva onisciform ; head small, shining, retractile; seg- 

 ments deeply divided ; dorsal region elevated, not grooved. 

 Dull reddish-brown, slightly darker on the sides, dorsal line 

 grey. On each side a series of oblique whitish sub-dorsal 

 stripes, pointing forwards, and externally edged with black ; 

 the spaces between them paler. Head and legs black ; pro- 

 legs and ventral surface dull ochreous or pale brownish. On 

 oak. 



May and June. 



Pupa stout, blunt ; back much rounded. Pale brown, 

 wing cases and back spotted with dark brown. Sub- 

 terranean ; not attached, nor enclosed in a cocoon. (Fenn.) 



I once reared a specimen from a larva found feeding on 

 the soft substance of an immature gall of Cynips terminalis 

 (oak-apple), and fed up on the same pabulum. It, however, 

 was somewhat stunted in size. 



Mr. G. C. Bignell has found the butterfly, in Devonshire, 

 laying its eggs upon sallow (Salh), and has obtained and 

 reared the larva from the same plant. 



A lively, active, and pugnacious species, flitting about the 

 outer branches or around the tops of oak trees, sitting on the 

 leaves, and dashing off them to attack any passing specimen 

 of its own or an allied species. It has even been seen to 

 attack a wasp, and most fiercely to return to the charge again 

 and again, until disabled. 



Abundant in oak woods throughout the southern, eastern, 

 and midland counties, also in Wales; and occurring, in 

 greater or less numbers, in suitable places throughout Eng- 

 land, and in Scotland as far north as the districts of Tay and 

 West Ross; more local in Ireland, but found in the Dublin 

 and Wicklow districts, and also in Kerry. 



