Food Plant: Acer campestre (Field Maple), A.pseudoplatanus (Sycamore), Acer platanoides (Norway Maple) Elsewhere: A.saccharinum (Silver Maple)

Egg: Underside, usually close to a vein.

Mine: June-July, increasingly bivoltine (especially in Southern England)

Pupa: In a silken cocoon on either side of leaf

Notes: C.hauderi is now known to be the spring generation of C.semifascia in the UK ( Langmaid et al (2011) Nota Lepidopterologica 33, 191-197). Early mine a gallery leading to a squarish blotch. Later forms up to three successive tubes or cones by folding the tips of leaves downwards (compare with C.hauderi which forms cones, not cyclinders as above).

Data: 2002, Norfolk

Image:© Andy Musgrove