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23 April 2007, New Brunswick, Canada. Body length (head to tip of abdomen) 3mm.
3rd femur enlarged, row of spines behind eye, spikey palps. Family or better?

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Phoridae! perhaps Megaselia sp.??

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Thanks Jorge, a new Fanmily for me;)

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here phorid flies are very common (specially Megaselia sp.). I see them in window in very quick movements (hence the name scuttle flies), and with Citrus limon as well! They are attracted by white and yellow things. ;)

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Phoridae, but not Megaselia since it has strong setae on legs (in additional to spurs). It's a female which makes even generic placement dififcult. Diplonevra?

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i think Sabine could provide the correct genus and perhaps species. :)

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Hi everybody, I will do my best to help you. I was on holiday in the Netherlands the last two weeks to explain my late answer ;)

Its definitely not Megaselia and a female, you are right Kahis. I would say that it could be a Borophaga female. The swelling of vein 3 at the distal end, and the strong basal bent of the vein 4 seem very typical. To give you my assessment it eventually could be Borophaga femorata (Meigen 1830).
But to be completely sure I would need a better picture of the wing and the tibias 1-3.

I hope you are satisfied with my determinations.

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with this help, I will photo some more phorid flies. :)
It would be great to have confirmation of Borophaga femorata!

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Thank you, most helpful. Unfortunately these images are the best detail I can achieve with my camera.

We have 5 species in NA:
Borophaga clavata Loew 1866 (Phora)
Borophaga fuscipalpis Schmitz 1952 (Borophaga)
Borophaga subsultans Linnaeus 1766 (Musca)
Borophaga tinctipennis Borgmeier 1963 (Borophaga)
Borophaga verticalis Borgmeier 1962 (Borophaga).
clavata appears to be the most probable based on distribution and the fact that it has been mis-identified in NA as femorata
Tony

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Sabine- it is Borophaga subsultans, a common species in the Maritimes.

Brian