This is Philonicus rufipennis. It is a creekrunner and often takes damsels along these creeks. Note the orange and black leg coloration, the white mystax and the banding of the abdomen in this male with the elongate genitalic appendages. This small genus is related to Machimus and in the past these genera and the old Tolmerus genus have been bounced around in the shrinking Asilus genus. We may have one other Philonicus but it is not proven in our state.

The female with very similar leg markings. Found together on the creek rocks in most clear streams in the Ozarks. Sometimes in very large numbers.