1. !"#$%'() *+,-,(%,.%-+/%0-$/1231-4+ 5/./$/64/%7,88/49,6 (All photos by Bob Henricks unless otherwise noted.)

2. :1;?+/2/$,?-/$1

3. Small Minnow Mayfly

4. Small Minnow Mayfly, lateral view

5. Brushlegged Mayfly

6. Brushlegged Mayfly, dorsal view (note hairy forelegs and meshed hair in tails)

7. Ameletid Mayfly

8. Ameletid mayfly, dorsal view

9. Flatheaded Mayfly

10. Flatheaded Mayfly, genus Epeorus (note two tails, not three)

11. Spiny Crawler Mayfly

12. Spiny Crawler gills

13. Spiny Crawler Mayfly, genus Drunella (note muscular forearms)

14. Little Stout Crawler, note triangular operculate gills

15. Small Squaregill Mayfly (note square operculate gills)

16. Pronggilled Mayfly

17. Common Burrower Mayfly

18. Armored Mayfly

19. 0-,6/