I've seen Dioctria sp. several times, I have pics of a female feasting on an insect.
I have seen two other Asilidae recently, one which I have had before I think but only managed one not-very-good pic, one of the chunkier types! Two days ago I had one with black and yellow legs on my window sill, as I was taking pics it flew near me in a loop and landed again, it had caught one of those tiny black beetles so I go tmore pics of it feasting on the poor little thing! I must try to find out which one it is as I have not seen it before
Janet