Plate LXIV 

 Caudal Gills of Nymplis* and Wings of Adults 



Fig. 70. Enallagma carunculatum, 



gills. 

 Fig. 71. Enallagma cyatliigerum, 



gills. 

 Fig. 72. Enallagma gcminaium, 



gills. 

 Fig. 73. Agrion arquahile, wings. 

 Fig. 74. Hetacrina amcricana, 



wings. 

 Fig. 75. Enallagma civile, gills. 



Fig. 76. Enallagma liagcni, gills. 

 Fig. 77. Enallagma cxsulans, dark 



and light gills. 

 Fig. 77a. The same, abnormal gills. 

 Fig. 78. Iletaerina amcricana, 



male, wings. 

 Fig. 79. The same, nymphal skin. 

 Fig. 80. Enallagma ( ?) calverti, 



lateral gill. 



*Oiie 

 abdomen. 



of the lateral yills removed in cases where the gills are attached to the 



