375 White-barred Clearwing (Synanthedon spheciformis)
A two-year lifecycle, possibly three, overwinters as a larva
Recorded size range of fully grown larvae - 25 to 28mm
Usual larval stage August to the second or third May
Adult forewing - around 12 to 14.5mm. Flies mid-May to early July
Larval foodplants : Larvae feed inside the base of a trunk or roots of birch (Betula spp.) or alder (Alnus spp.)
Not currently available on this website. For photographs of larvae, a pupa and adults see:-
http://www.lepiforum.de/