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Is this one of the Sarcophagidae? It looks different from the Sarcophaga that I see normally in my garden. I found it a few weeks ago indoors (Bilthoven, Holland). It is 11 mm long.

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Well observed.
That should be a Macronychia.
It even looks like M. striginervis.

Any chance you can check the hairs on the backside of the head ?
Are those all black or both black and white ?

Theo

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The long hairs on top of the head and the smaller ones at the side are all black, as far as I can see, but I'll check it tomorrow, when I have better light. The smaller hairs at the backside, behind the eyes, are (more or less) visible on this photo.

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This would have been a perfect photo, if the leg was missing.

Are the pulvilli long or short (is it male or female).

See you tomorrow


Theo

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On the lower part of the back of the head are whitish (silverish) hairs. The pulvilli are inconspicuous: the same length as or shorter than the little claws.

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then is looks like a female and it looks like striginervis, as first impression.
Female striginervis is very obvious by a strong ovipositor.
SO look at its tail.


Theo

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I have been looking for its ovipositor, but I can't find it, certainly not something as conspicuous as on this photo ( http://diptera.info/forum/viewthread.php?forum_id=5&thread_id=5141 ), as you can see on the photo I've attached.

So I thought I had done something wrong. I checked the characteristics you've mentioned again: it centainly has has whitish hairs on the lower part of the back of its head (silverish isn't a good description, though, on second inspection they look even a bit yellowish) and the pulvilli seem small to me, but perhaps I've judged that wrongly. Could it be a male?

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You are right, it is a male after all, Difference is difficult to see, so I checked in my collection.

BUt striginervis is correct: hairs are indeed yellowish,not whitish, but by no means blackish.

So: male Macronychia striginervis

Theo

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Many thanks, Theo.