Just got hold of in a charity shop (brand new) an electronic mosquito repellent in the shape of a ladybird ... its supposed to keep them away from babies, clip it on a buggy etc. the packet says it takes one 5v battery..... it emits a barely audible sound of a dragonfly's wing beat - the mosquito's mortal enemy! (West Nile virus whatever that is, wonder if it works for the Arillas mosquitos) I thought it might be worth a try and could clip it on the headboard of the bed or the curtains.. Watch this space I will let you know! I am game to try anything to keep them away