In a few rare species the wings, or halteres, or both, are wanting.
Abdomen ochraceous, black at the tip; femora testaceous at the base; halteres testaceous.
Wings blackish brown; stigma and veins black; halteres apple-green.
Halteres were also used for general exercise, like modern dumb-bells.
Calyptrate: those flies that have aluke or membranous scales above the halteres.