I think it's an ordinary Chrysis-ignitagroup member, a male (counting by the antennae lids)?
Location and date: Holland, southern part, 04-07-2015, my garden.
I was wondering if the hole is caused by damage, that it is hatched as a larvae this way (mutation?) or that is is how it is supposed to be?
The Chrysis was about 10-11mm, so rather large.