- 1/16" in length.
- Tan coloured body appears as grey.
- Wings densely covered in hair and held tent–like over the body when at rest.
- Eggs hatch 1–6 days.
- Larvae 10–50 days to mature.
- Pupae 1–3 days to mature.
- Often related to sewage beds where larvae feed on sludge–like organic matter.