Thanks, Jorun. They do look like yours and the ones in the link. I had missed John's post. I have seen them in the past, mainly on roses but, like you, have never seen them in such numbers. They seem to bore into the heart of flowers and completely ruin them. I noticed today that they are also having a go at our Scabiosa cretica. At the moment I am picking them off by hand, which doesn't seem to be very effective. Next year I will try the trap. I wondered if, in the short term, I could spray the irises with something to protect them.