I found parasitic wasp in my garden.

Looks like tomato hornworm with eggs on its back that i showed few years back.

yup. I found it on my tomato plant. But it's not eggs, the white stuffs are cocoon.

Yes thats cocoon i forget , here is the one i took off the plant stem and all just like your picture !
Looks like his hook stinger or whatever its call on his body on far left side sticking up.

The wasps are beneficial insects. They will pray on the rest of the caterpillars.

Those parasitic cocoons emerging from the host - just gives me the creeps ( ..aliens.. !).

A note to jimmy:
Pl. edit your thread tittle and add the word "Parasitic" to it.
(rather than just plain 'Wasp')
For us many fig-people; the word 'wasp' normally has a veeery different meaning when it comes to them figs...