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UK Nature > Flies > Graphomya maculata

Scientific Name: Graphomya maculata
Common Name: Muscid Fly

Graphomya maculata, more commonly known as a Muscid Fly, has an orangey-brown patterned abdomen in the males but females have a grey/black pattern (as above). Both have distinctive stripes on the thorax. Found in meadows, hedgerows and roadside verges nectaring on various flowers, especially umbellifers. On the wing from May to September/October. The larvae are predatory, feeding in muddy pools and damp leaf litter. Common and widespread in England and Wales.

I am reliably informed that this could in fact be Graphomya picta, but to tell the difference between the common G. maculata and the scarcer G. picta depends on 1) The presence or absence of a bristle on the mid-tibia (absent in maculata). 2) The abdomen of picta is longer than it is broad, and vice versa in maculata. 3) The tergites (underside of the abdomen) of G.maculata are almost all translucent orange-yellow, this colouration being much reduced in G.picta. As this is the only picture I have, I cannot reply to points 1 and 3, but from memory, and also from what I can see of the abdomen in this photograph, it would appear broader than than it is long, which would indicate G. maculata.

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