38 DRAGONFLIES OF OHIO. 



The male abdominal appendages from above are 

 about the length of 10, divaricate, compressed, obtuse 

 with a small denticle before the end on the inner side; 

 in profile wider apically excavated, lower angle, (or 

 branch ) prominent, nearly as long as the upper 

 slightly decurved branch, projecting from the apical 

 excavation is an ovate, pale tubercle, the organ is 

 slightly constricted at the middle. The lower appen- 

 dages are curved upward, attaining the lower angle of 

 the superior appendages. 



The female appendages are rather long cylindrical, 

 pointed ; the valves ovate narrow, processes black. 



This beautiful species appears to occur throughout 

 the state and to be common in June especially south. 



Enallagma carunculatum, Morse. 



Length : of abdomen d 27, ? 27; of hind wing (^ 20, 

 ? 21. 



This species closely resembles the preceding so 

 closely, indeed, that both have stood under one label in 

 the cabinets of specialists for years until Morse separ- 

 ated them by naming and defining the present species 

 in 1895. Now that the differences have been pointed 

 out, the wonder is that experts could have united them. 

 The females are distinguished with more ditficulty than 

 the males. 



The males are sepa.rated readily, first by dorso- 

 abdominal spots and second by the abdominal append- 

 ages. In carunculatum the apical black on rings 2-7 

 covers two thirds their length, in civile only one third ; 

 again the superior appendages are shorter, less com- 

 pressed, hence more nearly cylindrical, the apex less 

 spreading so that the tubercle which occupies the sinus 

 . is not so broad vertically, the tubercle ^is different in 

 shape being narrow and curved like a new moon with 

 rounded ends, and it lies in a grove on the inner lower 

 face of the appendage. 



