Insect fossils from the Florissant formation

Insects are somewhat commonly preserved in the shale layers of the Florissant formation. Below are some fine examples that I found over twenty years ago.

A Robber fly (?)

Some kind of wasp or flying ant (both sides)

A moth with some wing patterning preserved

The Florissant formation is the remains of a temporary lake that is dated to the Eocene period (Priabonian stage) and is located in Colorado.