As hammerman has intimated, they are harmless, and its only for a short while, unless you've got a Phobia, in that case, i'm not going to tell you how to get rid of them, but a Garden Centre would be able to advise you, and sell you a product that would do the job.
I would like to get rid of them as they are coming into the house, especially the kitchen and finding them in my cups and on plates etc. This cannot be very healthy!