Ulmus spp. with larva mining leaves in a flat, 'necked', recumbent, bivalved case over two years in a similar way to C. alnifoliae, except that the final case is larger and longer, and can be found feeding from May to the end of July, the imagine emerging the following year.
Determination by Genitalia Examination (gen. det.) Required
Recorded in 44 (31%) of 140 10k Squares. First Recorded in 1887. Last Recorded in 2020. (Data up to end 2020) Additional Stats