Place a dryer sheet in your pocket. It will keep the mosquitoes away.
I have tried this and it really seems to work. I've also rubbed one over my daughters arms and then placed it in her pocket when we're outside in the yard chalking in the evening and I've watched mosquitoes come near to her, hover a moment and then fly away. I've never seen one land when she's got a dryer sheet about her, which is awesome because I hate the smell of the sprays and I don't like using them on small kids or babies.
I also love to use them at night, when I see a mosquito flying about the house, or just as a precaution, I'll put them in my babies bassinet or next to my daughters pillow. I'm not awake to be sure, but so far I think it's working.
"People who tell you not to let little things bother you have never tried sleeping in a room with a mosquito."