1. StreamWatch Family ID Slideshow

2. Key to select mayfly larvae http://bugguide.net/node/view/74567/bgimage

3. Mayfly Larvae Morphology Guide to Aquatic Inverteb rates of the Upper Midwest, p. 37

4. 1A. Head flattened dorsoventrally, eyes and antennae dorsal Flathead (Heptageniidae) http://www.dfg.ca.gov/abl/images2/ironodes_head.png

5. 1A. Flathead (Heptageniidae) http://www.pbase.com/tmurray74/image/61450222

6. 1B. Head not flattened, eyes and antennae lateral 2 1C. Unclear if head is flattened preserve http://www.troutnut.com/specimen/694

7. 2A. Prothoracic legs (first set of legs) with a dense row of setae (hair) along inner surface Brushlegged (Isonychiidae) http://www.entomology.umn.edu/midge/VSMIVP%20K ey/English/Isonychiidae.htm http://www.pbase.com/tmurray74/image/114911606

8. 2A. Brushlegged (Isonychiidae) http://www.pbase.com/tmurray74/image/114911612

9. 2B. Prothoracic legs without setae 3 2C. Unclear if prothoracic legs have setae preserve http://bugguide.net/node/view/49022/bgimage

10. 3A. Median caudal filament (Middle tail) reduced or lacking Small Minnow (Baetidae) http://www.pbase.com/tmurray74/image/110648170 http://www.pbase.com/tmurray74/image/114367511

11. 3B. Median caudal filament well developed 4 3C. Unclear if median caudal filament is present, possibility of broken tail preserve http://www.troutnut.com/specimen/443

12. 4A. Gills pronged, forked, or consisting of a slender filament Prong-gilled (Leptophlebiidae) http://www.entomology.umn.edu/mi dge/VSMIVP%20Key/English/Lepto phlebiidae.htm http://www.pbase.com/tmurray74/image/1 http://www.pbase.com/tmurray74/i 10909718 mage/59402763

13. 4B. Gills round, oval or heart-shaped not forked 5 4C. Gill shape is unclear preserve http://bugguide.net/node/view/266381/bgimage http://www.troutnut.com/specimen/718

14. 5A. Gills present on abdominal segments 1 3 preserve 1 2 3 http://bugguide.net/node/view/279026/bgimage http://www.troutnut.com/specimen/718

15. 5B. Gills absent from abdominal segment 2, rudimentary or absent from segment 1 and sometimes absent from segment 3 Spiny Crawler (Ephemerellidae) 3 4 5 6 http://bugguide.net/node/view/259874

16. 5B. Spiny Crawler (Ephemerellidae) http://bugguide.net/node/view/259877/bgimage

17. 5C. Gills are operculate, or unclear if gills are present on segments 1-3 preserve http://www.entomology.umn.edu/midge/VSMIVP%2 http://www.dfg.ca.gov/abl/images2/Tri 0Key/English/Caenidae.htm corythodes_gills2.png http://www.troutnut.com/specimen/568 http://www.dfg.ca.gov/abl/images2/Tricorythodes_newhabitus2.png

18. Key to select dragonfly larvae http://www.pbase.com/tmurray74/image/111213357

19. Dragonfly Morphology Guide to Aquatic Inverteb rates of the Upper Midwest, p.66

20. 1A. Third segment of antenna is much larger and possibly a different shape than the other sements (4th segment is small and barely visible) Clubtail (Gomphidae) http://www.entomology.umn.edu/midge/VSMIVP%20Key /English/Gomphidae.htm http://bugguide.net/node/view/263809/bgimage

21. 1A. Clubtail (Gomphidae) http://bugguide.net/node/view/263808/bgimage

22. 1B. Third segment of antenna not larger than other segments 2 1C. Unclear if 3rd segment is larger preserve http://bugguide.net/node/view/255141/bgimage

23. 2A. Prementum (lower lip) flat when viewed from the side. When viewed ventrally, prementum is widest in distal half but not parallel sided Darner (Aeshnidae) http://www.entomology.umn.edu/midge/VSMIVP% http://www.pbase.com/tmurray74/image/109642026 20Key/English/Aeshnidae.htm

24. 2A. Darner (Aeshnidae) http://www.pbase.com/tmurray74/image/109642026

25. 2B. Prementum spoon/scoop shaped when viewed from the side preserve 2C. Unclear if prementum is flat or spoon shaped preserve http://www.entomology.umn.edu/midge/VSMIVP%20Key/English/Cordulegastridae.htm

26. Key to select damselfly larvae http://bugguide.net/node/view/260089/bgimage

27. Damselfly Morphology Guide to Aquatic Inverteb rates of the Upper Midwest, p. 65

28. 1A. First segment of antenna is as long as, or longer than, remaining segments combined Broadwinged (Calopterygidae) http://www.entomology.umn.ed u/midge/VSMIVP%20Key/Engli sh/Calopterygidae.htm Rose Brown photo: Rivanna at Milton

29. 1B. First segment of antenna is shorter than others combined 2 1C. Unclear if first segments of antennae are long preserve http://www.dfg.ca.gov/abl/images2/archilestes_head.png

30. 2A. Basal half of prementum greatly narrowed and elongate Spreadwinged (Lestidae) http://www.entomology.umn.edu/m idge/VSMIVP%20Key/English/Lesti dae.htm http://www.pbase.com/tmurray74/image/95281414

31. 2B. Basal half of prementum not greatly narrowed Narrowwinged(Coenagrionidae) 2C. Unclear if prementum is narrowed preserve http://www.entomology.umn.edu/mi dge/VSMIVP%20Key/English/Coen agrionidae.htm http://bugguide.net/node/view/255064/bgimage

32. Key to select stonefly larvae http://www.troutnut.com/specimen/487

33. Stonefly Larvae Morphology Guide to Aquatic Inverteb rates of the Upper Midwest, p. 78

34. 1A. Filamentous or Telescoping gills present on sides of thorax and/or ventral thorax 2 http://www.entomology.umn.edu/midge/VSMIVP %20Key/English/Perlidae.htm http://www.entomology.umn.edu/midge/VSMIVP%20 http://www.troutnut.com/specimen/350 Key/English/Pteronarcyidae.htm

35. 1B. Filamentous gills present only on ventral cervix (neck) Nemourid (Nemouridae) 1C. Unclear if gills are present preserve www.aquatax.ca/plecoptera/Nemouri daeGills.jpg http://www.pbase.com/tmurray74/image/110935526

36. 2A. Conspicuous filamentous gills present on sides of thorax and/or ventral thorax 3 http://www.entomology.umn.edu/midge/VSMIVP% 20Key/English/Perlidae.htm http://www.entomology.umn.edu/midge/VSMIVP%20Key/E nglish/Pteronarcyidae.htm

37. 2B. One telescoping gill present at base of each leg Large Winter(Taeniopterygidae) 2C. Unclear if gills are present preserve http://www.troutnut.com/specimen/350 http://www.troutnut.com/specimen/350

38. 3A. Filamentous gills present on ventral abdominal segments 1 and 2 Giant (Pteronarcyidae) http://www.troutnut.com/specimen/334 http://www.troutnut.com/specimen/334

39. 3B. Filamentous gills absent from abdomen Common (Perlidae) http://www.troutnut.com/specimen/767 http://www.troutnut.com/specimen/767

40. 3C. Unclear if gills are present on ventral thorax and/or abdomen preserve http://www.troutnut.com/specimen/488

41. Key to select caddisfly larvae http://www.pbase.com/tmurray74/image/95399019

42. Caddisfly Larvae Morphology Guide to Aquatic Inverteb rates of the Upper Midwest, p.38

43. 1A. Caddisfly in a case 2 http://www.pbase.com/tmurray74/image/110473352 Rose Brown photo

44. 1B. Caddisfly not in a case 3 http://www.troutnut.com/specimen/720

45. 2A. Case is a dome of small rock particles that completely covers larva in dorsal (top) view. On the ventral (under) side, there is a strap of smaller rock particles. The larva hangs over the strap, with head and thorax on one side and the end of the abdomen on the other side (both ends of larva are visible) Saddle Case Maker (Glossosomatidae) http://www.dfg.ca.gov/ABL/images2/anagapetus_case.png http://www.dfg.ca.gov/abl/images2/gloscas1.png

46. 2B. Case is very small, composed of fine sand or silt. Case is constructed with two similar halves and compressed from side to side, resembling a purse Micro Caddisfly (Hydroptilidae) http://watermonitoring.uwex.edu/images/level1/ wav/ecology/Hydroptilidae.jpg http://www.dfg.ca.gov/abl/images2/hydroptila_habitus_ withcase.png

47. 2C. Case is unlike above, or difficult to see preserve http://www.pbase.com/tmurray74/image/111399160 http://www.pbase.com/tmurray74/image/109997968

48. 3A. Larva is bright yellow-orange. The tops of the second and third thoracic segments are soft and fleshy, without hardened plates Fingernet (Philopotamidae) http://www.pbase.com/tmurray74/image/111032573

49. 3B. Larva is bright green and has long abdomen with deep constrictions at each segment (best seen in top view). The tops of the second and third thoracic segments are soft and fleshy, without hardened plates. No filamentous gills on abdomen Freeliving (Rhyacophilidae) http://www.pbase.com/tmurray74/image/110921297

50. 3C. Larva is not bright yellow-orange or green, or color and shape are unclear preserve http://www.pbase.com/tmurray74/image/110921300 http://www.pbase.com/tmurray74/image/109167612

51. Key to select beetles http://www.dfg.ca.gov/abl/images2/ptilodactylidae_adult_habitus.png

52. Adult Beetle Morphology Guide to Aquatic Inverteb rates of the Upper Midwest, p. 39

53. 1A. Adult beetle 2 http://bugguide.net/node/view/163435/bgimage

54. 1B. Larval beetle 3 1C. Unclear if beetle is adult or larval preserve http://www.pbase.com/tmurray74/image/114344092

55. 2A. Beetle has slender and long antennae, which are longer than head Riffle (Elmidae) http://www.pbase.com/tmurray74/image/114324576

56. 2B. Beetle has short, thick antennae which are sometimes not visible Long Toed (Dryopid) http://bugguide.net/node/view/171214

57. 2C. Antennae are unclear, possibility of broken antennae preserve http://www.dfg.ca.gov/abl/images2/helichus_adult_dors http://www.pbase.com/tmurray74/image/114807295 al.png

58. 3A. Larval body is elongate, cylindrical and sclerotized (hardened). Abdominal segment 9 with a tuft of filamentous gills and a hard, moveable ventral operculum Riffle (Elmidae) http://www.dfg.ca.gov/abl/images2/zaitzevia_habitus.png http://www.dfg.ca.gov/abl/images2/microcylloepus_operc ulum.png

59. 3B. Larval body is elongate, cylindrical and sclerotized. Abdominal segment 9 with a tuft of filamentous gills, and no ventral operculum (Ptilodactylidae) http://www.dfg.ca.gov/abl/images2/ptilodactylidae_larva_habit us2.png http://www.dfg.ca.gov/abl/images2/ptilodactyl idae_larva_gills.png

60. 3C. Larva is not like above preserve http://www.pbase.com/tmurray74/image/111183241

61. Crane Fly larva and True Fly pupae http://ecology.hku.hk/jupas/Hexatoma%20sp.jpg

62. Crane Fly Larva http://www.pbase.com/tmurray74/image/110921303

63. Midge pupa http://www.thechronicflyfisher.com/chironomid.JPG

64. Black Fly pupa http://www.nwnature.net/macros/efl_2008/april/images/P1130653.jpg