The wasp'''s antennae scan every millimeter of bark.
For a very specific spot.
She'''s found it.
Now megarhyssa manoevres her ovipositor into position.
But it'''s much too long.
First it'''s coiled into a special flexible pouch in her abdomen.
Now the drill is at right angles to the wood.
She can bore straight through the bark.
With hi-tech precision she drills towards the larva of a wood wasp.
The megarhyssa pierces its body and injects her venom.
This won'''t kill the larva, but paralyzes it for ever.
She retracts the ovipostor just a little.
And then lays an egg directly on to the surface of the immobilized wood wasp larva.
Her egg turns into a larva, that will eat the paralyzed host bit by bit... ...until it'''s ready to emerge.