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Suffolk Natural History, Vol. 36
RECENT RECORDS OF SOME NOTABLE AND RARE DIPTERA FROM SUFFOLK A. C. HUBBARD The following records are of species that are considered to be nationally scarce and threatened as categorised by Falk, S. J., (1991). Category definitions and criteria referred to in this paper are as follows: RDB2 – Vulnerable – Species declining throughout their range, occurring in vulnerable habitats or with low populations RDB3 – Rare – Species which are estimated to exist in only fifteen or fewer modern 10-km squares Notable – Species occurring within the range of 16–100 modern 10-km squares Tabanidae Haematopota grandis (Meigen) RDB3 Dingle Marshes TM 47-723 August 1996 Butley River TM 38-5018 August 1996 Dingle Marshes TM 48-72 7 July 1999 This is a species of coastal marshes; the above records all involved females biting. Atylotus latistriatus (Brauer) RDB3 Flatford TM 08-3323 July 1995 Brantham TM 12-3321 July 1996 Another coastal species which has an association with saltmarsh; both records involved females – one resting on a stile step, the other on oak foliage along the northern bank of the River Stour. Hybomitra ciureai (Seguy) RDB3 Dunwich TM 47-703 August 1996 Confined to the coast; record refers to a female on flowers of hogweed. Stratiomyidae Beris clavipes (Linnaeus) Notable Frostenden TM 48-7923 June 1995 Frostenden TM 48-7916 June 1996 Single males on both occasions, one on alder foliage overhanging a ditch, the other on reedmace at the edge of a ditch in an area of grazing marsh, the typical habitat. Vanoyia tenuicornis (Macquart) Notable Frostenden TM 48-7916 June 1996 Sizewell Belts TM 46-6326 June 1999 A male was taken off ditch vegetation at Frostenden and a female was captured by general sweeping over a herb-rich meadow at Sizewell.
Trans. Suffolk Nat. Soc. 36 (2000)