| Here are three small slabs of shale from the upper Eocene Chicken Creek Formation, Bull Run Basin, Nevada, bearing several dark-brownish, carbonized fossil fly larvae; none of the arthropods is longer than about 8 millimeters. |
| Here are three small slabs of shale from the upper Eocene Chicken Creek Formation, Bull Run Basin, Nevada, bearing several dark-brownish, carbonized fossil fly larvae; none of the arthropods is longer than about 8 millimeters. |