EXPLANATION OF Til E PLATES. 



PLATE I. 



]'i'.. 1. Epophtkalmia spec? n. side view; /<, labium; c, palpus with movable hook; 

 '/. antenna'. 



2. Maeromia Illinoiensis; nvinpha from Texas. 



3. Maeromia transversa; u, front view of head. 



PLATE II. 



Fig. 1. Maeromia Illinoiensis. nympha skin, Mass. ; <t. front view of the head : />. side 

 view of abdomen. 

 '•' 2. Maeromia magnirica ; a, side view of abdomen. 

 " 3. Maeromia Moorei : », side view of abdomen. 

 " 4. Maeromia tseniolata ; a, antennae. 



PLATE III. 



Fig. 1. Maeromia spec, from Mexico; a, front view of the head; b, side view of 



abdomen. 

 " 2. Epitheca bimaculata ; '/. appendage, male j h. female ; '■, side view of the head ; 



</. antenna: e, side view of abdomen. 

 " 3. Epitheca princeps. 



PLATE IV. 



Fig. 1. Epitheca eynosura ; a, end of abdomen from above; />, side view of abdomen. 



" 2. Epitheca spec.. Japan. 



3. Epitheca :~pee.. Illinois; «. side view of abdomen. 



" 4. Epitheca libera ; a, side view of abdomen. 



PLATE V. 



Fig. 1. Cordulia albicineta : c, palpus with movable hook. 



" 2. Cordulia spec. : «. abdomen below. 



" 3. Cordulia Grayi. 



" 4. Cordulia metallica; a, side view of abdomen. 



5. Cordulia aenea : a, side view of abdomen. 



