Gonna get them damn aphids

I have a serious aphid problem, but, on my way back from lunch today, what did I see on the ground but a ladybird... and a second... and another. I found four altogether and they're in a paper cup beside me right now. I can hear them making little clicking sounds as the climb up the sides of the cup and fall back down.
I've put some tissue paper soaked in water in there with them so their little insect throats won't be too dry.
Hopefully, they'll have a nice feed of green and black-fly when I get them home.