288 
Psyche 
Fig. 22. 
Fig. 23. 
Fig. 24. 
Fig. 25. 
Fig. 26. 
Fig. 27. 
Fig. 28. 
Fig. 29. 
Fig. 30. 
Fig. 31. 
Fig. 32. 
Fig. 33. 
Fig. 34. 
Fig. 35. 
Fig. 36. 
Fig. 37. 
Fig. 38. 
Fig. 39. 
Fig. 40. 
Fig. 41. 
Fig. 42. 
Fig. 43. 
Fig. 44. 
Fig. 45. 
Fig. 46. 
Fig. 47. 
Fig. 48. 
Fig. 49. 
Explanation of Plate 21 
Perliphanes, femur. 
Calliperla, femur. 
Diploperla bilobata, femur. 
Togoperla immarginata, femur. 
Occiperla sp v femur. 
Eastaperla brevis, femur. 
Alloperla imbecilla, femur and tibia. 
Isoperla, femur. 
Hydroperla, femur. 
Isogenus, basal portion of antenna. 
Perlesta, basal portion of antenna. 
Isoperla bilineata, basal part of antenna. 
Eastaperla, basal part of antenna. 
Alloperla, basal part of antenna. 
Isoperla ? mohri ?, basal part of antenna. 
Diploperla modesta, basal part of antenna. 
Walshiola montana, basal part of antenna. 
Megahelus bellona, basal part of antenna. 
Neoperla clymene, basal part of antenna. 
Perlodes signata, basal part of antenna. 
Acroneuria, basal part of antenna. 
Clioperla maculata, basal part of antenna. 
Calliperla luctuosa, basal part of antenna. 
Perla and Togoperla, basal part of antenna. 
Isogenus frontalis, maxillary palpus. 
Diploperla bilobata, maxillary palpus. 
Perliola 5-punctata, maxillary palpus. 
Clioperla ebria, maxillary palpus. 
