86 Cameron, Ilyviciioptcra On'cnialm. 



testaceous, paler at the base ; the hinder femora rufo- 

 testaceous ; the apical half of the hinder tibi;e and the 

 claws black. Wings hyaline, iridescent ; the stigma and 

 nervures black ; the upper part of the prx-brachial trans- 

 verse nervure, and the lower part of the first transverse 

 cubital arc bullated ; the second transverse cubital nervure 

 is faint. The basal three segments of the abdoinen are 

 strongly alutaceous ; the others smooth and shining ; on 

 the middle of the petiole is a keel which extends nearly to 

 the apex ; the ventral segments are smooth and shining. 

 [As I am not by any means certain if the species here 

 described can be inducted in Rhogas I give a generic 

 description of it. 



Eyes distinctly incised on the inner side above ; the 

 head narrowed behind them. Occiput margined. Antennae 

 with over 50 joints. Wings with three cubital cellules ; 

 the probrachial nervure received shortly behind the 

 middle of the cellule ; the anal nervure interstitial. 

 Stigma large ; the second cubital cellule longer than 

 broad. Parapsidal furrows distinct. Median segment 

 keeled down the middle. Abdomen subsessile; keeled 

 down the middle at the base ; the basal three segments 

 opaque, alutaceous, longer than the apical four, and 

 becoming gradually shorter ; the apical segments are 

 smooth and shining. Mandibles short, bidcntate. 



The eyes are large, parallel, and reach near to the base 

 of the mandibles ; the clypeal incision is large ; the occiput 

 slightly, but distinctly, roundly incised ; there is a short 

 depression on the second and third abdominal segments 

 behind the stigmas, and they are sharply margined at the 

 sides ; the third to fifth segments project sharply at the 

 apices laterally ; the second transverse cubital nervure is 

 very faint, almost obliterated ; the second cellule is slightly 

 shorter than the first and not half the length of the third; 



