#3
How right you are Ruud! :-)
Subfamily Microdontinae, but I don't dare to put a genus name on it. If you change the title to Microdontinae Menno Reemer will find it. He could tell you more I guess...
#5
Hi,
This is a species of the genus Archimicrodon. It is similar to A. brevicornis (Loew), but the taxonomy of this group is not worked out well.
For more on the generic taxonomy of Microdontinae, see ZooKeys 288 (open access PDF online at the ZooKeys website).