I am fighting a terrible infestation of Tribulus Terrestris (goathead) weeds. On my daily weed patrol, I discovered that several plants were absolutely crawling with tiny black insects. They appeared to be clustering on the underside of the leaves and on the seedpods. I've heard of a species of weevil that feeds on these things. I can't quite tell if the insects I'm seeing match the pictures given there. Is there a chance these could be those beneficial weevils? In which case, I'd be better off leaving those plants alone, so I'd like to know before I dig 'em up.