Plate LXIV 

 Caudal Gills of Xijmplis* and ^Yings of AduHs 



Fig. 70. Enallayma carunculatum, Fig. 7G. Enallagma hagcni, gill.s. 



gills. Fig. 77. Emdlagyna cxsulaus, dark 

 Fig. 71. Enallagma ciiatliigcrum, and light gills. 



gills. Fig. 77a. The sanic. aljiiormal gills. 



Fig. 72. Enallagma gi minalam, Fig. 78. Ilctacrina amcricana, 



gills. male, wings. 



Fig. 73. Agrion avquahdc, wings. Fig. 79. The same, nymphal skin. 



Fig. 74. Ilctacrina amcricana. Fig. SO. Eiudlagma ( ?) ctdvcrti, 



wings. lateral gill. 



Fig. 75. Enallagma civile, gills. 



*One of the lateral gills lemoveil in casos where the gills are attached to the 



abdomen. 



