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Black Flies (Simuliidae)
Photo#1712992
Copyright © 2019
ophis
black fly pupal cases
Walpole, Norfolk County, Massachusetts, USA
June 8, 2019
Size: 4.2 mm (at right)
Two cases at left are occupied, with exsert thoracic gills. On submersed wood at base of spillway, Willett Pond dam.
Larger image
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Contributed by
ophis
on 17 August, 2019 - 7:04am