high above the pronotum and often are brought together so as 

 to form a complete angular arch over the thorax. In walking, 

 the abnormally developed claw of the chelae is always folded 

 back on the fifth joint of the tarsus, and is not used except spe- 

 cially for grasping its prey. In the comparatively slender, wing- 

 ed insects of the genera Ncodryinus, Paradryinus and Chloro- 

 dryinus, the abdomen of the females is recurved or bent on its 

 apical part, and is always kept in this position when the insects 

 rest, and generally wlien hunting their prey ; and this is also the 

 case with the large apterous Chalcogonatopus. When at rest 

 thev have a most extraordinary appearance for they sit sub-erect 

 on their tail (i. e. the recurved apex of the abdomen), supported 

 otherwise by only the two hinder pair of legs, the front pair be- 

 ing held in the position already described, the tarsi usually some- 

 what inclined, and free from the surface on which the others rest. 

 On the other hand, the slender, winged Echthrodclphox, and the 

 small wingless insects of the Gonatopus group, whether resting 

 or running, hold the body segements straight, and only in the 

 act of stinging their prey are these bent or recurved. 



The short-legged, stout insects with large stigma to the front 

 wings naturally do not exhibit the peculiarities that are shown 

 by the species of the above named genera. Many of them, 

 moreover, seem to be better endowed with powers of flight, the 

 sexual disparity is much less, the males are more hardy, and, in 

 the case of Parantcon at least, copulation may take place many 

 times, in striking contrast with the feeble male of Echthrodel- 

 phax, which frequently drops dead within a few minutes after 

 the act. 



Although in some cases a species of the Dryinidae will attack 

 more than one species of leaf-hopper, and indeed sometimes 

 parasitizes species of different genera, yet in the latter case these 

 genera always belong to the same group of hoppers. In no case 

 have we ever found one to attack a Jassid or Fulgorid indis- 

 criminately. Indeed from a study of structure we should sup- 

 pose such a case to be impossible. Riley however is said to 

 have bred Laheo typhlocybae from a Typhohcyba, whereas this 

 ST)ecies of which the female was described as Dryimis onnenidis, 

 is well known to be a common parasite of the Fulgorid genus 

 Ormenis, and it might be well to confirm Riley's unique instance. 

 Also in need of confirmation is Lichtenstein's Gonatopus ptino- 

 rum, said to be parasite on the beetle P turns fur. 



Like other parasitic Hymenoptera some of the Dryinidae are 



