Plate LXIII 



Cduddl Gills of Xi/niplis^ 



Fig. 58. Argia mocsta pufrido. Fig. G5. Ischnura vcrticalis, 

 Fig. 59. Ampliiagrion saucium. young nymph. 



Fig. 60. Aiwmalagrion liastatum. Fig. 66. Jsclinura posifa. 



Fig. 61. Nelialenriia irene. Fig. 67. Argia apiccdis. 



Fig. 62. Ischnura verticalis. Fig. 68. Argia fihialis. 



Fig. 63. Argia violacea. Fig. 69. Emdlagma signatum, 

 Fig. 64. Ischnura posifa. variations in pig- 

 mentation. 



*Oiio of tho lateral yills leinoveil in cases where the gills are attached to the 

 abdomeu. 



