Acartophthalmus

Acartophthalmus is a genus of flies, the only genus in the family Acartophthalmidae. They are 1.0–2.5 millimetres (0.04–0.10 in) long, and grey or black in colour, with pubescent arista. Only four species are included.
The biology of Acartophthalmus is almost unknown. The adults have mainly been found in forests, while larvae have been reared from dead wood and decaying organic material.
Species
The four species included in the genus are:

Acartophthalmus nigrinus (Zetterstedt, 1848) Holarctic (common).
Acartophthalmus bicolor Oldenberg, 1910 Holarctic
Acartophthalmus latrinalis Ozerov, 1986 Russian Far East.
Acartophthalmus pusio Frey, 1947 Frey Europe.

Two of the species occur in the United Kingdom. There is also an uncertain fossil species.
References
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