so, apparently the larvae are packaged in buckwheat husks and are so small, you can't really see them (sounds like the king's new clothes but what do I know )..if I want to see them, I have to tip the lot onto a white plate, put them somewhere warm and they will crawl about.
since the instructions say to place a couple of larvae on each plant that has greenfly ???
anyway, will spread the rest around tomorrow and see what happens :-\