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15.012 Caloptilia semifascia (Haworth, 1828)
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Food Plant: Acer campestre (Field Maple), A.pseudoplatanus (Sycamore), A.saccharinum (Silver Maple), Acer platanoides (Norway 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

sponsored by Colin Plant Associates (UK) LLP/Consultant Entomologists