: Ephemeroptera. : Trichoptera.

The mayflies is a small, yet well-known order of primitive, winged insects.

Mayflies Ephemeroptera
Creative Commons Attribution | Hallvard Elven | Leif Aarvik | Natural History Museum, University of Oslo

The caddisflies comprise a medium sized order of winged, holometabolous insects.

Caddisflies Trichoptera
Creative Commons Attribution | Hallvard Elven | Leif Aarvik | Natural History Museum, University of Oslo