Morley’s Final Catalogue: By no means common, on birch. Bentley Woods in late April 1895 (Mlv); Ipswich 1931 (Whit); Orford in July 1902 (Gibbs); Aldeburgh in 1892 (Ctw); Leiston (Grey), Blythbro Wood.

Recent Status: Recorded commonly in the Sandlings, especially as larvae.

Life Style: A double brooded species that may be found from May to August. The larvae feed under a web on the top-side of Betula leaves. They pupate in a white web covered cocoon on the ground

Identification: This species is very similar to Paraswammerdamia nebulella. S. caesiella is smaller on average does not have a clear line of black dots along the base of the costa and has a clear usually double white spot on the costa before the apex. When this is distinction is unclear genitalia dissection is required for identification. More Info

Verification Grade Comment: Poorly marked / worn examples Grade 4

Recorded in 29 (50%) of 58 10k Squares. First Recorded in 1892. Last Recorded in 2023. Additional Stats

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