The flies in this small family (41 NA spp) are fairly abundant at Cedar
Creek.
Amphicnephes pullus
is a brilliant green fly with black wings. It has been taken in a number
of fields, primarily prairie. Another species? of Amphicnephes
has been taken in savanna. Perhaps three species of Rivellia
have been collected at Cedar Creek. These small flies with three dark wing
bars are common in the savanna region south of Fish Lake. A brown and a
black form are present. They spend much of their time walking about on
foliage and waving their wings. A larger dark species has been taken from
a few fields.
