Diachlorus ferrugatus (Fabricius), a fierce biting fly (Diptera, Tabanidae)

The Tabanid Diachlorus ferrugatus (F.), which occurs from Costa Rica to Mexico and in the south-eastern United States from Texas to New Jersey and has also been recorded from the Bahamas, is one of the most serious biting flies wherever it occurs. The females attack man vigorously throughout the day, particularly in cloudy conditions, in or near forest and near lakes, causing painful and persistently irritating bites. They also attack indoors. Domestic animals, including dogs, are also readily attacked in shady situations. The adults are active in Florida from March to November, with a peak in April-June. Larvae have been found in deeply shaded areas in root mats of woody plants, beneath the water surface. Deet is moderately effective in repelling the adults.