what bug is this?

[popper]

Hello,

I have a Renanthera Monachica in a wood basket.
Today a find many of bugs like this around the basket and in the aerial roots.
I don´t know this bugs from the books.
Are they wood bugs?
They have about 1mm lenght, they have legs and they have a abdomen biger than the head.
The skin is soft and have some liquid inside.
The color is black.
What is this, and how do i kill them?
I allready spray some biological product and some bugs died but anothers no.