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Is it possible to say which Lauxaniidae fly this is..?
Picture is made 28-8-2008 in Zeist, Holland

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I am in the Emirates and I did not take literature with me. So I cannot be sure, but I think it is an anisodactyla female.

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Forgot genus: Aulogastromyia anisodactyla, but I'd rather see it checked by Katka or Paul. I would like to see the literature

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A. anisodactyla is correct.
Katka

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Hello Ruud and Katka,

Ruud, it seems to me that you don't need any book, sometimes maybe you have to think twice..:).. but then you have the answer..! Thanks that eventhough you're far away, you still take care over my flies... I wish you a nice stay there.
Katka, thank you for your confirmation!!

Regards,
Hedy

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Am I correct in thinking males are uncommon? or am I just looking for these in the wrong places or times?

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Thanks Katka!
No, they are not that uncommon. Just pay attention to the typical Lauxaniid flies, yellow, with extraordinary hind tarsi. The tarsus is shaped into a long thin claw. Please, look at he gallery: there are some good photo's

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Yes I am familiar with what they look like and have seen museum specimens. I turn up a good number of females, but have never caught a male specimen myself.

I was wondering if the males have a different habit/habitat (like in some Tabanids)? or if they really are just uncommon (like in some Lonchoptera).

From memory, I think i had about 20 specimens this year, and all are female.

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Hmm, strange...I think you never caught a male by chance. I have about a same number males and females at my collection.
Katka