About Tapeigaster annulipes Macquart, 1847
Adults of Tapeigaster annulipes are medium-sized flies, with bodies and wings ranging from 7 to 8 mm (0.28 to 0.31 in) in length. All bristles on the head and thorax are black, and the antennae and arista are also black. The thorax is reddish, with a broad grey longitudinal stripe running down the center of the mesoscutum from the neck to the scutellum, plus broad grey stripes running down the sides of the thorax. The halteres are whitish. The scutellum shares the same reddish color as the rest of the thorax, and is only dusted with grey at its base. The legs are a shining reddish yellow, with dark spots on the femora. The fore and middle femora are thickened, with the thickening being most pronounced in males. All femora have black bristles on their upper surface, and are covered in white hairs on their lower surface. The tarsi turn black toward the claws. The abdomen is reddish and pubescent, and the middle abdominal segments have a darkened hind border. The male genitalia is prominent, and is reddish yellow with long, dark hairs. The female ovipositor is red. Tapeigaster annulipes is associated with several species of fungus, including Agaricus campestris and Omphalotus nidiformis.
