Small (1 to 6 mm. ) dark brown flies with a scuttling (fast, scrambling, jerking) habit of running very fast across a surface rather than flying. Upright posture, hump-backed appeararance.
Also (and closer)
Strong head bristles (setae).
Very characteristic wing venation. Several short, strong, thickened wing-veins crowded basally. The rest are weak. See photo of Conicera tibialis in the Articles account Diptera reared from sow dung.
One colour usually dark brown (some yellow).No pattern.
Femora laterally flattened.
Small (1 to 6 mm. ) dark brown flies with a scuttling (fast, scrambling, jerking) habit of running very fast across a surface rather than flying. Upright posture, hump-backed appeararance.
Also (and closer)
Strong head bristles (setae).
Very characteristic wing venation. Several short, strong, thickened wing-veins crowded basally. The rest are weak. See photo
One colour usually dark brown (some yellow).No pattern.
Femora laterally flattened.