Eriocampa umbratica (Klug, 1816)
on Alnus
parasite
Oviposition scars like in Eriocampa ovata; also rhe larvae are similar to that species, the woolly wax covering here is even more extreme.
host plants
Betulaceae, monophagous
references
Beneš & Holuša (2015a), Buhr (1964a), Roskam (2019a).