Efferia genus
family: Robber Flies
Roger Mills County, OK
8/14/2013

Efferia albibarbis
family: Robber Flies
Bill Williams River NWR, La Paz County, AZ
7/18/2011

Efferia producta
family: Robber Flies
San Bernardino County, CA
6/5/2021

Efferia aestuans
family: Robber Flies
Grand Lake, Delaware County, OK
8/1/2012