Needham — Neic Genus and Species of Dragonfly. 57 



a branch: there is a single row of cells, except at the extreme margin 

 between M 3 and M 4 , and between Cuj and Cu,. The fusion of veins 

 Mj_ 2 with the radius occurs just before the second hypertrophied ante- 

 nodal crossvein. 



Abdomen cylindric, greenish blue dorsally, with dagger-shaped mark 

 of black upon the dorsum of each segment, the color and markings be- 

 coming obscured apically in the type specimen (perhaps from fading). 

 Segments 3-7 of equal length: segments 8, 9 and 10 each successively 

 one-third shorter than the preceding segment. Superior appendages a 

 little longer than the 10th segment, simple, depressed beyond the base, 

 a little arcuate with the tips slightly convergent, rounded without, but 

 with a fine longitudinal carina within, and armed with minute prickles 

 dorsally and toward apex: color black, with the extreme apex yellow. 

 Inferior appendages rudimentary. 



Poco Grande, Brazil, January 13, 1808, Mr. Adolph Hempel, collector. 



The type is in the Cornell University Collection. 



