Morley’s Final Catalogue: Found only on 22 July 1898 in Ipswich (Pyett), doubtless among elm, whence the Bishop has bred it plentifully in the same district.

Recent Status: A common species in Suffolk.

Life Style: A double brooded species that can be found during May, June, August and September. The larvae feed on leaves of Ulmus. They pupate in a brown cocoon in the larval habitation. The pupal stage passes the winter.

Identification: The name suggests it has three fasciae, however the third one is the third dorsal mark variably connected to the third or fourth costal mark. There is a very small white mark at the base representing a basal streak. The wing colour is a constructed from the dark anterior edging gradually fading through bright orange brown into the white of the previous mark. This species does not show any glossy or metallic colouring of similarly marked species.
The larvae create long blister blotches on the underside between veins which is strongly constricted into a tube. The mine is wider and less constricted when Ulmus procera is the foodplant. More Info

	Determination by Genitalia Examination (gen. det.) Required

Recorded in 52 (90%) of 58 10k Squares. First Recorded in 1898. Last Recorded in 2023. Additional Stats

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