Nope, #3 isnt Target Earth. But i cant think of the name of the thing. That robot worked for a Vampire woman from space, and i saw the flick not to long ago on a buddies DVD. Watch it be something like Vampire Woman from Space.
Being a color picture is throwing me off. Most of the giant bug movies were in b/w. The first thing that came into my mind was "Journey to the Center of the Earth" but that doesn't look right. Then "The Black Scorpion" was next but in b/w? Oh well, I give up on this one, who has the answer?