286 
Psyche 
[Dec. 
Explanation op Plate 20 
Fig. 1. Pteronarcys spinosa, anal part of fore wing. 
Fig. 2. Harrisiola flavescens , anal part of fore wing. 
Fig. 3. Clioperla ebria, anal part of fore wing. 
Fig. 4. Perlodes signata, anal part of fore wing. 
Fig. 5. Peltoperla maria , anal part of fore wing. 
Fig. 6. Acroneuria lycorias, anal part of fore wing. 
Fig. 7. Isogenus frontalis, anal part of fore wing. 
Fig. 8. Walshiola montana, anal part of fore wing. 
Fig. 9. Kathroperla perdita, anal part of fore wing. 
Fig. 10. Diploporla, anal part of fore wing. 
Fig. 11. Clioperla similis, basal part of fore wing. 
Fig. 12. Bariksiana Tcansensis, anal part of fore wing. 
Fig. 13. Pictetia expansa, anal part of fore wing. 
Fig. 14. Eydroperla subvarians, basal part of fore wing. 
Fig. 15. Isoperla bilineata, anal part of fore wing. 
Fig. 16. Isoperla transmarina, anal part of fore wing. 
Fig. 17. Diploperla bilobata, basal part of fore wing. 
Fig. 18. Perliola 5-punctata, forking of cubitus. 
Fig. 19. Hastaperla brevis, anal part of fore wing. 
Fig. 20. Togoperla immarginata, basal part of fore wing. 
Fig. 21. Atoperla fumipennis, basal part of fore wing. 
