to the History of Stylops. 131 



Polyhia sericea, ? , Brazil. A female protruding beneath the 

 fourth segment. 



Polistes Americanus, ? , N. America. The abdomen much dis- 

 torted by a male Stylops having escaped from the pupa case, 

 which projects from beneath the fourth segment. 



Polistes instahilis, $ , Brazil. The abdomen distorted by the 

 pupa case of a male Stylops beneath the fourth segment, and the 

 head of a female beneath the fifth segment. 



The foregoing enumeration of species, and the localities from 

 whence they were derived, shows that Stylops and its affinities, 

 or rather allies, have a wide geographical range. Some of the 

 parasites must be insects of considerable size, as compared with 

 the British species ; judging from the size of the pupa cases, 

 I should expect that the expansion of wing of the Stylops infest- 

 ing Polistes instahilis could not be much less than eight lines, or 

 two-thirds of an inch. 



I have not observed any insect from the Australian continent 

 or New Zealand infested by Stylops. 



K 2 



