Thanks for your question.
CItronella oil or candles is a very good treatment for mosquitos. You can buy these at various places such as walmart, local stores, health food stores or home depot. If you buy the oil, add a teaspoon of oil to a quart of water in a spray bottle and spray it around your porch. This should keep those mosquitos away for a few days before you ned to spray again. The candles work also but they can be a fire hazard.
Hope this helps,