PONTIA. 



153 



represented a specimen of the Butterfly which had been taken 

 at Bath. In recent times more specimens appear to have 

 been captured about Dover than anywhere else in England, 

 which lends colour to the surmise that most of the so-called 

 " British " specimens were blown over, or otherwise introduced, 

 from the Continent. 



This Butterfly measures about an inch and three-quarters 

 across the wings, which are white above, with a marginal black 

 band on the fore-wings, spotted with white, running from the 

 apex to below the middle of the hind-margin. Near the hinder 

 angle is usually a detached black spot, largest in the female, 

 and a broad black band, divided by a white line, runs from 



Larva and pupa of P. daplidice. 



the costa just beyond the end of the cell. The hind-wings are 

 unspotted in the male, except for the markings of the under 

 side showing indistinctly through, but are usually more or less 

 heavily bordered with black in the female, with a row of white 

 spots between the broad dusky nervures. The fore-wings 

 beneath are coloured as above, except that the dark markings 

 are greenish. The hind-wings are green beneath, varied with 

 yellowish, and dusted with black, with a row of large white 

 spots on the hind-margin, an irregular transverse white band, 

 and three white basal spots. The spring brood, P. hdlidice^ 

 has the dark sub-marginal band narrower, and more interrupted 



