Fungus Gnats

Family Mycetophilidae

These small flies are typically brown, black, or orange, and often have heavily spined middle and hind tibiae. Some have the head hidden or almost hidden under "hunched shoulders." Often bristles or hairs are present on the dorsal surfaces of the thorax.

Three ocelli are usually present, but sometimes the middle one is vestigial or missing.

The antennae do not exceed the body length, and usually have 14 flagellomeres.

The common name refers to the larvae often feeding on fungi. While larvae are sometimes found in decaying wood, in mosses, and bird and mammal nests, it is possible the larvae are feeding on fungi present in those locations. Most of the literature about the biology of larval Mycetophilids pertains to European species, while the habits of North and South American larvae are largely unknown (Brown et al., 2009).

Click on a thumbnail to see a larger image with text

Mycetophila cf. unipunctata
Mycetophila fungorum s.g.
Monoclona sp.
Mycomya sp.
Rondaniella dimidiata
Sciophilinae nr. Neoempheria

American Insects site