MARBLED WHITE BUTTERFLY. 193 



a little beyond the middle ; that next the anal angle 

 is double. The body is black above., and densely 

 clothed, as well as the base of the wings, with yel- 

 lowish hairs. Varieties occur in which one of the 

 colours occupies greater part of the wing : that in 

 which the black predominates has been taken near 

 Dover ; * in the other, which has been named Leit- 

 comelas, the secondary wings are entirely white be- 

 neath. 



The caterpillar is yellowish-green, with a dark 

 line along the back, and another on each side. The 

 head is reddish-brown, and there are two small spines 

 of the same colour on the hinder extremity. It is 

 found in May on the Timothy grass [Phleum pra- 

 tense). 



This pretty butterfly is regarded as very local, 

 but its localities are pretty widely scattered over 

 the south of England. It is usually found in moist 

 glades, or in bogs and marshy ground, but some- 

 times frequents places of a very different description. 

 The following are a few of the stations in which it 

 has b6en observed in greatest plenty. Near Dover, 

 Teignmouth, woods at Baylham Hall, Ipswich, Da- 

 renth Wood, &c. It is likewise abundant near 

 York, which is probably its most northern residence, 

 as it is not known to occur in Scotland. 



* This variety is figured by Esper {die Schmetterlinge, 

 tab. iij, fig. 4), and a similar one is represented in Loudon's 

 Mag. Nat. Hist. v. 335. 



