REVISION OF STREPSIPTERA PIERCE. 



21 



At Dallas, Texas, October 11, 1906, Mr. R. A. Cushman and the 

 writer collected two nests. In the first 13 male and 4 female wasps 

 were unparasitized and 1 male was parasitized, while in the second 

 the 9 males and 1 female were all unparasitized. 



POLISTES METRICUS Say. 



Austin (1882) at Readville, Massachusetts, on August 20, 1879, 

 took Polistes metricus parasitized as follows: 



14 male wasps taken, 2 parasitized. 

 36 female wasps taken, 7 parasitized. 



1 female wasp contained 7 male parasites. 



1 female wasp contained 2 male parasites. 



1 female wasp contained 1 male parasite. 



1 female wasp contained 1 female parasite. 



According to note 3513, U. S. Department of Agriculture, Bureau 

 of Entomology, a specimen of this wasp bearing 8 fully grown females 

 was taken September 4, 1884, near Washington, D. C. Other wasps 

 taken on the same date bore empty puparia. 



POLISTES PALLIPES Lepeletier. 



At Marion, Massachusetts, on September 2 and 12, 1902, Mr. Fred. 

 C. Bowditch took 10 Polistes falliyes parasitized by Acroschismus 

 oowditclii Pierce. 



Five adult males were bred, and these have been studied by the 

 author. In the 4 male wasps are 16 male pupae. In the 6 female 

 wasps are 4 female parasites, 1 male pupa, and 9 empty puparia; 

 that is, each male averaged 4 parasites and each female 2.33 parasites. 

 The parasites were in the proportion of 26 males to 4 females, or 

 only 13.3 per cent females. The highest number of parasites to an 

 individual was 10, all pupae, in a male wasp. 



The record of parasitism was thus : 



2 female wasps with 1 male, 1 female= 4 parasites. 



1 female wasp with 1 male, 2 female = 3 parasites. 

 1 male, 2 female wasps with 1 male only = 3 parasites. 

 1 male wasp with 2 male = 2 parasites. 



1 male wasp with 3 male = 3 parasites. 



1 female wasp with 5 male = 5 parasites. 



1 male wasp with 10 male =10 parasites. 



4 male, 6 female wasps with 30 parasites. 



The location of the parasites was as follows : 



Location. 



Dorsal. 



Ventral. Total. 









3 male. 

 12 male. 







5 male 





male, 2 female 



1 male, 2 female 



2 male 



1 male 



8 male, 2 female. 





2 *nale, 2 female. 





1 male. 











84359— Bull. 66—09- 



