84 The Ohio Journal of Science [Vol. XXI, No. 2, 



Euchlorolestes genus nov. 



Type — Chlorolestes fasciata Selys. 



This genus includes also Chlorolestes tessellata Burm. and 

 Chlorolestes longicanda Burm. Apical soft fold of penis erect 

 and hoodlike; Ac lies slightly distad of the level of the first 

 antenodal. 



Episynlestes genus nov. 



Type — Synlestes alhicanda Tilly. 



Quadrilateral broad, its inner end one-third of the hind side, 

 first segment of Cu2 present. Penis with a long attenuate tip. 



Ceylonolestes genus nov. 



Type— Austrolestes analis Ramb. 



Includes also aridus, colensonis , cyaneus, divisus, gracilis, 

 leda and tenuissimus. Naiad with lateral lobe as in the naiad of 

 Lestes, at least so in analis. Penis with a spiral strap on the 

 terminal lobe. 



Chalcolestes genus nov. 

 Type — Lestes viridus Lind. 



Differs from Lestes in that the upper segment of the arculus 

 equals the lower and that the penis lacks the internal fold. 



Africalestes genus nov. 



Type — Lestes virgatus Burm. 



Venation as in Chalcolestes, except that vein Mia is nearly 

 straight throughout its length. Penis with a strap-like inner 

 fold as in Ceylonolestes. 



Platystigma genus nov. 



Type — Mecistogaster jocaste Hagen. 



Penis with a broad, toothed terminal segment. Dense black 

 part of stigma reduced to one cell in hind wing. 



Xanthostigma genus nov. 



Type — Mecistogaster ornatus Ramb. 



Includes ornatus and its varieties. Penis with a broad 

 linear terminal segment without lateral teeth. Black part of 

 stigma lacking in both wings. 



Haplostigma genus nov. 



Type — Mecistogaster modes tus Selys. 



Penis with terminal fold united to the apical segment. 

 Dense part of stigma more than three cells long. Hind wing 

 of male without costal dilation before apex. 



