MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPIDiE. 



Horismology of the wings. 

 FROXT WIIfG. 



13 



HIJfD WING. 



THE LEGS. 



The shape of the legs, armature, tibial spurs, number of joints in 

 tarsi, length, etc., also atfortl excellent characters in classification. In 

 all groups, except sometimes in the Dryinime, the hind legs are the 

 longest. The femora in the Uethylinjc are usually very much swollen, 

 their tibia? stout, often spiny or fossorial; in the Dryinina" and Embo- 

 lemimei they are, for the most ])art, obdavate; while in other groups* 

 they are usually clavate or but slightly swollen. The tarsi, except in 

 the single genuo Iphetntchehis llaliday, in which they are 4 jointed, 

 are always o-Jointed. In all groups, except in the Dryinina?, they are 

 normal, but in this group the anterior tarsi in tlie females in most of the 

 genera, are peculiarly nuxlified, being chelate or furnished with a pair 

 of pinchers or tongs, that evidently att'ord assistance in seizing and 

 holding a living fulgorid, membracid, or Jassid (on which in the larval 

 stage they are parasitic), while in the act of oviposition. 



The structure of the leg is explained in PI. i. Fig. 1: c c c, coxae, 

 anterior, middle and posterior ; fr, trochanters, one-jointed; /cr, femora; 

 to, tibijB; tas, tibial spurs; tsi, tarsi; el, claws; els, simple, clt, toothed, 

 elp, pectinate; ps, pulvillus. 



THE AIIDOMEN. 



The abdomen is usually composed of 8 visible tergites and G urites, 

 although sometimes these are reduced in number to as low as 3. As 

 in other families, it exhibits great variation in shape and size and in its 



