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Simulium Society: 1. Two imagos of hydropsyche; 2. Imago of hydorpsyche; 3. Larva of hydropsyche; 4. Pupal case of hydropsyche; 5. Imago of roederiodes juncta; 6. Larva of Roederiodes juncta; 7. Pupa of Roederiodes juncta; 8. Pupa of Roederiodes juncta in an habitual position in the abandoned pupal case of Simulium venustum; 9. Egg mass of S. Venustum and two females ovipositing; 10. Pupae, empty pupa skins, and pupal cases of s.venustum; 11. Larva of S.venustum; 12. Male imago of Leuctra tenella, dorsal view; 13. Imago of Baetis pygmaea, lateral view; 14. Imago of Baetis pygmaea dorsal view; 15. Imago of Heptagenia pulchella; 16. Nymph of Heptagenia pulchella; 17. Pupal cases of hydropsyche sp.? in situ; 18. Pupae of Simulium venustum, in situ; 19,20. Larva of S.venustum in situ

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