Mine: Bivoltine, but Robbins suggests an extended single generation.
Pupa: Outside the mine.
Notes: An elongated blotch centred over a vein. There are two types: greenish with a blackish centre and entirely reddish-black Scarce (national status), very common in some years (Robbins). The larva is illustrated.
Image:© Rob Edmunds
Data: 18.vii.2004, Fleet, Hants, VC12