192 The Ohio Journal of Science [Vol. XVIII, No. 6, 



Strepsiptera. In addition to parasitizing the Ilomoptem, the 

 AnteonincB are themselves parasitized by the Encyrtidce and 

 EulophidcE. 



Aside from parasitizing the Homoptera most of the groups 

 mentioned attack such other insect groups as the Hemiptera, 

 Coleoptera, Diptera, Orthoptera and Hymenoptera. In com- 

 parison with the other groups it is noted that the AnteonincB 

 and Pipuncnlidce are narrowly restricted in their range of 

 hosts. 



BIOLOGY AND LIFE HISTORY. 



Adult. — The adult dryinids are found living in grasses, 

 herbage and trees, in fact wherever their hosts, the leaf- and 

 tree-hoppers, are found. The females are much more active, 

 continually running and flying about in search of their prey. 

 In species where the female is wingless, the habits of the two 

 sexes are very different, the males generally being found resting 

 on the leaves and stems, or flying about in search of the females. 

 In describing the habits of Lestodryinus (Dryinus) pyrillce 

 Kieffer, Misra (1917) says: "The adult females are very 

 active and may be seen actively flying about the leaves, occasion- 

 ally settling down, especially near the nymphs, and then flying 

 away. The adults are prominent mostly during the hottest 

 part of the day. " Later in the sam.e paper, speaking of Chloro- 

 dryimus paUidus Perk., he says: "It is the female which is 

 mostly in evidence in the fields when the leaf-hopper is present 

 in numbers on the canes. The male is rarely seen about the 

 infested fields. " 



Not all winged dryinids are as active as Misra has observed, 

 for Perkins (1905) says: "The prey is sought on foot, for while 

 most of the Anteonince {Dryinidce) are most active and rapid 

 runners, they are but poor performers on the wing. In most 

 of the winged forms, these organs are unduly short, and in 

 Echthrodclphax serve hardly more than to transport it from 

 one cane plant to another as occasion demands." There seems 

 to be no correlation between the presence of wings in this 

 family and the habit of attacking arboreal hoppers. Perkins 

 (1905) noticed that in Australia and generally in America, the 

 apterous forms of the Gonatopus type preyed upon hoppers that 

 fed on grasses and low herbage. "On the other hand," he 

 says, "the Hawaiian apterous species are essentially arboreal." 



