General comments:
Larva on Alder Alnus glutinosa. After mining the midrib and leaf, the larva cuts an oval case measuring five by three millimetres in which to pupate. Larvae are evident from June to September and the species is apparently double-brooded. Local and scarce in both of our two counties, probably reflecting the scarcity of Alder trees, though probably under-recorded to some extent.

	Determination by Genitalia Examination Required

	Mine: Either the leaf or a good photograph required

Recorded in 10 (24%) of 41 10k Squares. First Recorded in 1900. Last Recorded in 2023. Additional Stats

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