278 



Annals of the Carnegie Museum. 



Plate VIII. 



(Venation of Wings from Photographs by Dr. H. G. Kribs.) 



Fig. 139. Heliocharis amazona, Selys, $ , Chapada. 



Fig. 140. Perilestes fragilis ? Hagen, Chapada. 



Fig. 141. Diargia bicellidata, sp. nov., Chapada. 



Fig. 142. Oyagrion evanescens, sp. nov., Chapada. 



Fig. 143. Tigriagrion aurantinigrtwi, sp. nov., Chapada. 



Fig. 144 Argia thisma, sp. nov , Chapada. 



