1. Mesasternum (“belly”)
Labium (“lower lip”)
Labrum (“upper lip”)
Mandible
Maxilla
Palp
Antenna
Pronotum (“back”)
Prosternum (“belly”)
Mesanotum (“back”)
Mesasternum (“belly”)
Femur
Tibia
Metanotum (“back”)
Metasternum (“belly”)
Tarsus
Cerci

2. Odonata (damsel and dragonfly) nymph characteristics
Damselfly
nymph
Odonata (damsel and dragonfly) nymph characteristics
3 Anal lobes or points
Lower lip is a scoop-like structure longer than head
No visible gills
6 legs

3. Dragonfly nymph

7. Ephemeroptera (mayfly) nymph characteristics:
6 legs
2 or 3 cerci
Gills on abdomen

9. Gills on abdomen

10. Tusks

11. Adult Ephemeroptera

13. Mayfly swarm

14. Plecoptera (stonefly) nymph characteristics Six legs 2 cerci
Gills on thorax - none on abdomen

15. Plecoptera means “hinged wings”
Adult stonefly
Plecoptera means “hinged wings”

16. Trichoptera (caddisfly) larvae characteristics 6 legs
Often cased (not always)
VERY small antennae
Gills on abdomen

17. Cased caddis - after being taken out of it’s case

18. Hydropsychidae (case-less caddisflies)

19. Trichoptera pupae

20. Coleoptera (beetle) characteristics Adults: hardened outer wings
Relatively long hind legs
Larvae:
Hardened head capsules
6 legs
Elongated abdomens

21. (predaceous diving beetles)
Dytiscidae
(predaceous diving beetles)

22. Diptera larvae (flies) characteristics No legs - worm-like
At least some part of the head capsule is hardened

23. Chironomidae (Non-biting midges) in Order Diptera (flies)

24. Adult Chironomid

25. Simulidae (black fly)

26. Hemimetabolous
Nymph
Adult

27. Holometabolous
larvae
pupae
adult