Helina allotalla explained

Helina allotalla is a Palearctic fly from the family Muscidae.^{[1] [2]}

Description

See Morphology of Diptera for terms.The eyes are separated by less than 3 times the width of the third antenna! segment.Prealar bristle well developed, about two-thirds the length of second notopleural bristle.The abdomen has at most indistinct narrow paired spots. Arista. wider than third antennal segment. 6–8 mm.

Notes and References

1. Book: D'Assis Fonseca, E.C.M.. 1968 . Diptera Cyclorrhapha Calyptrata: Muscidae . 118pp. Royal Entomological Society of London. Handbooks for the Identification of British Insects. 10. London..
2. Book: Gregor, F. . Rozkosny, R. . Bartak, M. . Vanhara, J. . 2002 . The Muscidae (Diptera) of Central Europe. 280pp. Masaryk University. Scientiarum Naturalium Universitatis Masarykianae Brunensis. 107. Masaryk..