H VNK-, \. A \. ill.. |. I.I. .1,1 III 





PLATE 4. 



Fig. 37. Perla expansa, female, ventral plate. 



Fig. 38. Perla subvarians, female, ventral plate. 



Fig. 39. Nemoura javaniea, male genitalia from below. 



Fig. 40. Isoperla mormona, female, ventral plate. 



Fig. 41. Perla vertiealis, female, ventral plate. 



Fig. 42. Perla incesta, female, ventral plate. 



Fig. 43. Alloperla fidelis, female, ventral plate. 



Fig. 44. Perla anamensis, female, ventral plate. 



Fig. 45. Leuctra malayana, male genitalia from below. 



Fig. 46. Perla repanda, base of fore wing. 



Fig. 47. Perla repanda, male, genitalia from below. 



Fig. 48. Kathroperla perdita, female, ventral plate. 



Fig. 49. Oyamia nigripennis, female, ventral plate. 



Fig. 50. Oyamia nigripennis, male genitalia from above. 



Fig. 51. Perla carletoni, female, ventral plate. 









