- Metallic body color
- Postscutellum absent
- Calypters large and distinct
- Arista of antenna mostly plumose
The blow flies are a metallic blue or green color and are ubiquitous in nature. The antennae are aristate with a plumose bristle, and the calypters are large and prominent. They are distinguished by the absence of a post-scutellum. These scavenger insects lay their eggs on dead animals. The larvae feed on decaying tissue of animals. They are efficient disease vectors of dysentery.