Orders

Adult Diptera Features

Antenna

2. Antennae filiform to plumose, with at least seven segments............3
Antennae with fewer than 7 segments.......................11 10. Antennae arising above level of the middle of the eye; humpbacked appearance..........................(black flies) SIMULIIDAE
Antennae arising at or below lower edge of eye ..........(March flies) BIBIONIDAE 15. Antennae often diverge sharply from one another after initial parallel direction of basal segmentes; costal wing vein ending well before wing tip ........................... (soldier flies) STRATIOMYIDAE
Antennae without sharp angle: costal wing vein extending around wing tip .........16 16. Third antennal segment usually rounded, with terminal style head rounded dorsal view ........ (snipe flies) RHAGIONIDAE
Third aniennal segment elongate or with enlarged lobe head triangular from dors.............(horse and deer flies) TABANIDAE