The Meadow Sedgesitter (Platycheirus quadratus) is a small, dusky-yellow and black, Nearctic species. Males can be identified by abdomen pattern and flattened front tibia and tarsi (see drawing). Females, patterned similarly to the males, are not easily separable from other Sedgesitter (Platycheirus) species. Adults are commonly found on grass and sedge blades at the edge of ponds and wetlands where they feed on pollen grains.
Flight season: June – September
Similar species: Melanostoma mellinum and other Platycheirus species
The Western Roundtail (Melanostoma mellinum) is a small, dusky-yellow and black, holarctic species. Identifiable by abdomen pattern. Males lack the flattening or broadening of the front legs characteristic of similar Sedgesitter (Platycheirus) males. Adults can be found on leaf surfaces where they feed on the pollen of grasses (Poaceae) and other wind-pollinated plants but also visit a variety of flowers. Larvae are entomophagous, mainly aphids.
Flight dates: April – July
Flowers: Rue Anemone, Dandelion, Wild Plum
Similar species: Platycheirus quadratus