I found this information on the Mosquito Control's (poison center -- let's call it what it is) website:
"
Does Mosquito Control spray for things other than mosquitoes? Mosquito Control exists only to help prevent health problems caused by mosquitoes. The pesticides we use are only labeled for the treatment of mosquitoes. We are only licensed by the State of Florida for mosquito control purposes. For these reasons, Mosquito Control does not treat for ants or other pests. Consult a pest control company for treatment of these pests."
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That is very interesting because I thought they also sprayed to kill the Dog Flies, which are only aggravate people. If there statement is true, Skunky's theory on them targeting the Deer Fly population is not true either.