Top and bottom: Two undescribed bibionid flies (fungus gnat and March fly, respectively) from the middle Miocene Esmeralda Formation, Fossil Valley, Great Basin Desert, Nevada. Millimeter scale at lower left of each image. Fossil Valley is now a federally protected area; unauthorized collecting there is strictly verboten.

Both photographs taken by an individual named Iyawna Hazzard, courtesy Copyright © 2015 University of California Museum of Paleontology. I modified both images with photoshop.

Note that identification of fossils and their assignment to a geologic rock formation are my responsibility, and do not necessarily reflect the opinions of the University California Museum of Paleontology.