44 DRAGONFLIES OF OHIO. 



Abdomen slender, blue, dorsum black as follows: 

 narrow band on 1 and 2, whole dorsum of 3—7 and 10, 

 except narrow basal blue rings on 3—7. Female differs 

 slightly, blue paler or greenish, legs paler, pterostigma 

 yellow, humerals black with a bright brown streak 

 along the suture (narrower than in exsulans) , dorsum 

 of abdominal segment 1—8 black, a large basal spot on 

 9 black, the whole of 10 blue. 



The posterior margin of 10, in the male, with two 

 processes above; appendages black, short, upper 

 branch swollen, small process on inner upper angle, 

 from the outer side below arises the lower branch which 

 is slender, incurved, directed downward and bears a 

 light cushion on the inner surface ; the lower append- 

 age is slender, acute, arises from a wide base longer 

 than the lower branch of the superiors. The female ap- 

 pendages are short cones, black ; the valves pale. 



This species appears to be rare in most parts of the 

 state. 



Enallagma fischeri, Kellicott. 



Length: of abdomen d 9 24 mm.; hind wing, cT 17 

 mm.; 9 19 mm. 



Male black, orange, green and blue. Labrum, 

 anteclypeus, genae and frons orange ; the labrum has 

 three black points at base ; vertex, occiput, upper part 

 of eyes and antennas black ; cuneiform post-oculars 

 connected and greenish blue; head below pale yellow. 

 The prothorax is black above, with orange or green, as 

 follows: anterior lobe with a broad transverse line, 

 middle lobe with a geminate spot in the center and a 

 larger spatulate one each side, the posterior lobe with 

 three small spots below and on sides pale orange. The 

 "thorax" bronze-black with dorsal canna (sometimes 

 only anteriorly) and humeral stripe bright orange; the 

 legs yellow, with a black line on the outside of the fem- 

 ora and tibiae (these lines are lightest on the hind pair). 



