SCOLIA. 



GENERIC CHARACTER. 



Thorax with the first segment very much 

 arcuated and contracted on the posterior middle ; 

 antennae robust, with short close set joints ; the 

 first joint long, cylindrical ; second joint distinct ; 

 superior wings not folded ; radial cellule detach- 

 ed at tip from the anterior edge of the wing; 

 cubital cellules two or three, the last one remote 

 from the tip of the wing, the first one placed on 

 the same longitudinal line with the radial cellule ; 

 eyes emarginate ; stemmata three ; thighs thick, 

 arcuated in the females, compressed; tail three 

 spined in the males. 



OBSERVATIONS. 



A genus, in some respects, closely allied to 

 TiPHiA and Plesia, but at once distinguishable 

 by the emarginated eyes. The thighs are re- 

 markable for their thickness and curvature. The 

 form of the cubital cellules varies considerably, 

 but to a determinate and limited extent. In the 



PLATE XXIX. N 



