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| Record Summary | Male, in group displaying on fermenting sap run |
| Found as | Male imago |
| Date | 9 March 1997 |
| Associated organism | Betula / Fusarium? |
| OS grid ref | OSGR: SU56 |
| Lat/Lon | 51° 20’ N, 1° 10’ W |
| Vice County | Berks, VC no: 22 |
| Country | England |
| Voucher | 9 Mar 1997[CA] (Please quote this in any queries about this record) |
Notes:
Among 6 flies displaying on fermenting sap run on birch stumps cut one month ago.
In some individuals the abdomen was quite brightly red-tinged beneath towards the tip.
Upper side generally dark in life, and in alcohol; the abdomen paler than the thorax; eyes black in life, red in alcohol.
8 rows of acrostichals.
Maxillary palp with one strong terminal bristle and a shorter subterminal.
The following literature was used to identify this find:
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