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This one is awesome. I saw a Drosophila on a bottle of mineral water while having lunch, and I thought: it is to yellow... So I caught it and saw this!!! I think it is a Periscelidid (antenaee are like Periscelidids'). Some 2.5 mm long.

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2

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Drosophilidae. One for Paul. ;)

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Drosophila busckii

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Still a really nice fly, even if not a Periscelidid :) Thanks!

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If you want to collect Periscelididae I can recommend the use of a beer trap. I have currently one beer trap hanging in an oak tree (Quercus robur) which I check every sunday. Last sunday 14 periscelidids were present among the material. It's also a good collecting method for Odiniidae and Drosophilidae (like Drosophila busckii for example:)). But you also collect a lot of calyptrates (many Calliphoridae and Muscidae).

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Thanks, I tried with wine, placed it some 3 ms long, but found no Periscelidids. Only Drosophilidae and Calyptrata. It was in a small forest. I'll try to put one on an oak tree also!

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This "beer trap" sounds extremely interesting! Is it just some bait dipped with some tasty lager hanging somewhere and attracting flies or something more sophisticated or technically innovative?

The former alternative reminds me of my early days as a lepidopterologist.

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The beer trap I'm using is nothing sophisticated at all. Just a PET bottle of which you cut off the top part and put it in upside down again. In this way you create a funnel through which the insects (mainly flies) enter the PET bottle in which I poor a bottle of beer (in my case of the brand Bavaria). I hang this PET bottle in an oak tree at a height of appriximately 4 m. Once a week (in my case each sunday) I empty the trap and fill it with a fresh bottle of beer. It is a very simple method giving nice results (and a lot of work).

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That keeps an entomologist healthy one bottle of bear per trap per week.

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I've seen a ship in a bottle...How do you get a BEAR in a bottle.....:D.

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LoL. Professor Sneep was able to put a stopper into Death so a bear in a bottle should be a peace of cake. [Typo on intention to keep the conversation going. :P]

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Which Typo....bear (beer) or Sneep (Snape)

EDIT; Oddly enough I Googled "Sneep" and came across a shop in Maidenhead called Sneeps who had a "BEARS NUTS FORUM" now closed for maintenance. I don't know if they bottled BEARS NUTS....Nice job :|.
Small World

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When I made a trap with wine, it always sarted to ferment again after 2-3 days... The flies became un-examinable (and fermented:) How to prevent that?

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Keep the wine cooler at hand. :D

But seriously: In hotter periods you need to exchange the contents more often.

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>...In hotter periods you need to exchange the contents more often.

BEAR NUTS? In a trap? Instead of cow liver? Cool means not rotting and not stinking. And the attractant probably is hard to obtain... But sounds VERY PROMISING...

But hardly good for drosophilids and odiniids.