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Hello, are they Tipulidae, or Limoniidae ???
Didier
Informations about the picture :
North-East of Thailand
41130 Ban Phon Ngam
17.3633228, 102.9776517
date : 14/09/2019
size : about 10-12 mm

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another picture :

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They are Limoniidae if you split the families. I don't recognize the genus.

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The family is a progress ! Thank you very much
Didier

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.Isn't the Family Limonidae now being considered under a larger Family Limnophilidae?Or is the subfamily Limnoninae being promoted to cover Limnophilidae,Limonidae etc.

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This is the order of priority of family group names:

Tipulidae dates from 1802
Limoniidae dates from 1840
Limnophilidae dates from 1854

If all the crane flies are in one family that family is called Tipulidae with subfamilies Tipulinae and Limoniinae, and Limoniinae has a tribe Limnophilini. This is the traditional classification by Alexander, except he used the name Hexatomini for the tribe. Hexatomini has priority from 1869 and should not be used for a group that also includes Limnophila.

If the families are split there is a family Limoniidae with a subfamily Limnophilinae. I call this the European classification. The problem with splitting the families is the definition of Limoniidae is "everything which is not in one of the other subfamilies". That is an easy enough rule to apply, but goes against modern custom which expects taxonomic names to apply to monophyletic groups.

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Thank you. You ended a lot of confusion for me.

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Venational details are poorly visible yet I'd suggest Idiocera (s.str.)