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I'm not sure it is Diptera, I,m not sure it is even Insecta, may be mollusca or leech. First time I see such regular stracture. Moscow region, 15 july, small pond.

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Hi Nikita
Chironomidae usually lay their eggs in jelly, and they often arrange them in a spiral or circle within the mass. These are probably what yours are.
Tony

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Thank you Tony.
It is a difficult case. In addition to this site I showed photo to several Russian entomologist. There are two possibility so far:
1. Yours, Chironomidae.
2. Another one, Trichoptera.
Photo is from last year, 15-th of July, so in two weeks this eggs have to appear again in my pond. This time I'll try to do my best to rear it and find the answer.
Nikita

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I didn't forget about this eggs.
But this year I didn't find any.
So, at least, till next season...

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Could I try to come back to this forgotten thread?
Still no answer?
:@

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Have you found some more and reared them yet? Maybe less time in Thailand and more time in Moscow, and you would have done this! :P :D

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Having looked at Walter's post again (http://www.dipter...d_id=19364) - I'm sure yours are chironomid. The narrow shape of the egg is typical of a nematoceran, and they certainly look just like the eggs of chironomids I was studying 30 years ago. :)

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Hello,

I thought that Chironomidae laid eggs directly in water. On our French forum, we had a series of pictures (http://www.galerie-insecte.org/galerie/wikig.php?Ponte) that we tentatively identified as Chironomidae.

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1. So Chironomidae. Not too poetic answer :o
2. Thank you Tony and Pierre
3.

Tony, you forgot during this 30 years, that rearing under -10C is somewhat problematic :P
Nikita