18 



BULLETIN 66, UNITED STATES NATIONAL MUSEUM. 



The following data give more specifically the extent of parasitism 

 found in these wasps, bringing out the percentage of sexes of the para- 

 sites and their relations to each other: 



1 male wasp with 15 male parasites = 15 parasites. 

 5 male parasites = 5 parasites. 

 4 male parasites = 4 parasites. 

 3 male parasites = 18 parasites. 

 2 male parasites = 34 parasites. 

 1 male parasite =112 parasites. 



1 male wasp with 



1 male wasp with 



6 male wasps with 



17 male wasps with 



112 male wasps with 



138 male wasps with 188 male parasites. 



4 female wasps with 1 male parasite = 4 parasites. 



142 wasps with 192 male parasites. 



11 male wasps with 2 female parasites = 22 female parasites. 

 47 male wasps with 1 female parasite = 47 female parasites. 



58 male wasps with 

 2 female wasps with 1 female parasite 



60 wasps with 



69 female parasites. 

 2 female parasites. 



71 female parasites. 



Parasites. 



1 male 



1 male 



2 male 

 1 male 



1 male 



2 male 



1 male 

 5 male 

 5 male 



2 male 

 9 male 

 5 male 



28 male 



was]) 



wasp 



wasps 



was]> 



was]) 



wasps 



wasp 



wasps 



wasps 



wasps 



wasps 



wasps 



wasps 



with 

 with 

 with 

 with 

 with 

 with 

 with 

 with 

 with 

 with 

 with 

 with 

 with 



5 male, 



2 male, 

 5 male, 

 4 male, 



3 male, 



2 male, 



3 male, 

 3 male, 

 2 male, 



1 male, 



2 male, 

 J* male. 

 1 male, 



2 female 

 5 female 



1 female 



2 female 



3 female 

 \ female 

 2 female 



1 female 



2 female 



3 female 



1 female 



2 female 

 1 female 



(7) parasites 

 (7) parasites 

 (6) parasites 

 (6) parasites 

 (6) parasites 

 (6) parasites 

 (5) parasites 

 (4) parasites 

 (4) parasites 

 (4) parasites 

 (3) parasites 

 (2) parasites 

 (2) parasites 



5 male, 



2 male, 

 10 male, 



4 male, 



3 male, 



4 male, 



■■ 3 male, 



15 male, 



10 male, 



2 male, 



18 male, 



5 male, 

 28 male, 



2 female = 

 5 female = 

 2 female = 



2 female = 



3 female = 



8 female = 

 2 female = 



5 female = 

 10 female = 



6 female = 



9 female = 

 10 female = 

 28 female = 



7 



7 



12 



6 



6 



12 



5 



20 



20 



27 



27 



15 



56 



63 male wasps with 109 male, 92 female = 201 

 1 female wasp with 1 male, 1 female (2) parasites = 1 male, 1 female = 2 



64 wasps with 110 male, 93 female = 203 



The highest amount of parasitism then in the author's study was 15, 

 which number is exceeded by the record of 31 larvae in one larval host. 

 (Brues, 1903.) 



In summarizing these figures the following totals and percentages 

 are obtained, which bear directly upon the question of survival of the 

 parasites. 



138 male wasps with 

 63 male wasps with 

 58 male wasps with 



192 male parasites =192 parasites. 



109 male, 92 female parasites=201 parasites. 



69 female parasites= 69 parasites. 



259 male wasps with 301 male, 161 female parasites=462 parasites. 



4 female wasps with 

 1 female wasp with 



4 male parasites = 4 parasites. 



1 male, 1 female parasite = 2 parasites. 



