About Diachlorus ferrugatus (Fabricius, 1805)
Diachlorus ferrugatus, commonly known as the yellow fly, has the following description. Adult yellow flies are approximately 1 centimetre (0.39 inches) in length, with yellow bodies, yellow mid-legs, and yellow hind-legs, while their fore-legs are black. Their eyes are blue-green and marked with purple bands. Adults fly very quietly, so the first sign of their presence that humans usually notice is their bite. The larvae are thin white grubs covered in fine yellow fur, with three pairs of pseudopodia on each body segment. This species ranges from the southeastern United States, where it occurs between New Jersey and Texas, south to Costa Rica. It is most abundant near bodies of water with adjacent trees where it can hide, and Spanish moss (Tillandsia usneoides) is a common hiding spot for it.
