NO. 2242. MORPHOLOGY OF THE 8TREPSIPTERA— PIERCE. 395 



1 female leaf hopper with 3 female parasites= 3 parasites. 

 1 female leaf hopper with 2 female parasites= 2 parasites. 

 5 female leaf hoppers with 1 female parasite— 5 parasites. 



7 female leaf hoppers with 10 female parasites. 



13 leaf hoppers with 18 female parasites. 



1 male leaf hopper with 4 male, 1 female (5) parasites=4 male, 1 female=5 

 parasites. 



2 male leaf hoppers with 1 male, 1 female (2) parasites=2 male, 2 female=4 

 parasites. 



3 male leaf hoppers with 6 male, 3 female=9 parasites. 



2 female leaf hoppers with 2 male, 1 female (3) parasites=4 male, 2 

 female=6 parasites. 



4 female leaf hoppers with 1 male, 1 female (2) parasites=4 male, 4 

 female=8 parasites. 



I female leaf hopper with 1 male, 2 female (3) paraRites=l male, 2 

 female=3 parasites. 



7 female leaf hoppers with 9 male, 8 female=17 parasites. 



These figures give a total of 48 male and 29 female parasites to 51 

 hosts. The proportion of parasite sexes is therefore 62.3 per cent 

 males, 37.7 per cent females. Of the female parasites 18, or 61 per 

 cent, occurred in hosts containing no male parasites. 



Arranging the parasites according to sex of hosts we find that 

 39.5 per cent of the males occurred in male hosts and 60.5 per cent 

 in female hosts, while 37.9 per cent oi the females occurred in male 

 hosts and 62.1 per cent in female hosts, or taking both sexes to- 

 gether, 38.9 per cent were in male hosts and 61.1 per cent in female 

 hosts. 



The location of the parasites may be summarized as follows : 



5 males protruding from the third segment, dorsal ; 1 male protruding from 

 the third segment, lateral ; total, 6. 



II males protruding from the fourth segment, dorsal ; 4 males protruding 

 from the fourth segment, lateral ; total, 15. 



19 males protruding from the fifth segment, dorsal ; 3 males protruding 

 from the fifth segment, lateral ; 3 males protruding from the fifth segment, 

 ventral ; total, 25. 



1 male protruding from the sixth segment, dorsal ; total, 1. 



3 females protruding from the first segment, lateral ; 1 female protruding 

 from the first segment, ventral ; total, 4. 



1 female protruding from the second segment, dorsal ; 5 females protruding 

 from the second segment, lateral ; total, 6. 



2 females protruding from the third segment, dorsal ; 9 females protruding 

 from the third segment, lateral ; total. 11. 



1 female protruding from the fourth segment, dorsal ; 6 females protruding 

 from the fourth segment, lateral ; total, 7. 



1 female protruding from the fifth segment, lateral ; total, 1. 



These figures show that the majority of the males protrude from 

 the fifth segment, and also that they are most always dorsal, while 

 the females are mostly found in the third and are usually lateral, and 

 almost never ventral. 



