40 DRAGONFLIES OF OHIO. 



convex. The surface of both appendages are tuber- 

 culate, more marked on the inferiors. 



Hageni has been taken in few localities and always 

 about ponds and "cat holes"; it must be regarded as 

 uncommon or rare. 



Enallagma geminatum, Kellicott. . 



Length ; of abdomen cT 20, 9 19 ; of hind wing cT 

 9 15. 



Male. Head : labrum and browns blue, ctypeus and 

 vertex black, post-ocular spots cuneiform, not connec- 

 ted, blue; prothorax black edged with blue, scarcely 

 bilobed. Thorax black above with a blue stripe each 

 side (this is sometimes divided as in N. posita) ; sides 

 blue with a black line on the suture. Wings hyaline, 

 pterostigma black ; legs black and pale, tarsi black. 

 Abdomen brassy black, blue as follows : 1, apical ring 

 and a lateral spot connected with it ; 2, a basal ring 

 interrupted dorsally, this ring is sometimes very wide 

 and the interruption also, there is a lateral stripe con- 

 nected with the ring; 3-6, basal interrupted rings; 8— 

 9, wholly; abdomen beneath pale blue with brown 

 shades apically ; the abdominal appendages are black, 

 agreeing very closely in form with those of divagans ; 

 they are relatively stouter, and from above the outline 

 is more oblong ; there is a sharp tooth on the lower 

 edge of the inner face, the upcurved apex of the lower 

 branch (referring to the type exsulans) is a little 

 stouter, and more obtuse than in divagans, while the 

 upper one is a little less prominent ; the inferior 

 appendages are a little longer than the superior with 

 the acute apex curved upward and inward. 



Female. Very similar to the male. The blue of 

 the front of the head of the male is pale blue or brown- 

 ish ; the post-ocular spots and hnmeral stripes a little 

 paler ; the abdomen is black above, the sides pale blue, 



