145 



ted of being parasites upon the weevil. The results are therefore 

 made somewhat uncertain because of the impossibilitj^ of isolating^ 

 the weevil larvse. A condensed summar}^ of the results in breeding 

 parasites through two seasons' work is presented in Table XL. 



Table XL. — Breeding of parasites. 





Collector. 



Date. 



Squares. 



Weevils 

 bred. 



Parasites. 



Locality. 



Bracon 

 mellitor. 



Other- 

 spe- 

 cies. 



Squares picked from plants 

 and from ground. 



Calvert Tex; 



G. H. Harris 



W. E.Hinds 



1902. 

 July, August.. 

 do 



2,566 

 645 



387 



881 

 264 

 463 



342 



277 

 210 



108 



278 

 111 

 251 



120 



3 



1 



1 



10 

 3 

 



45 



1 



Victoria, Tex 



1 



Guadalupe, Tex 



fW. D. Hunter 



Iw. E.Hinds 



W.E.Hinds 



do 



JAugust 



1903. 

 June. . . . 



a 



Victoria Tex 



0^ 



Do 



July 



1 



Do 



do 



August 



July, August.. 



0' 



Infested squares dried on the 

 plants. 



Victoria, Tex 



W.E.Hinds 



5- 







Total 



5,548 



1,355 



63 



8- 









From these observations it appears that 24.4 per cent of the 5,548- 

 squares used produced adult weevils, while only 1.3 per cent of the 

 total squares contained parasites. Among the parasites obtained, 90 

 per cent were of the single species, Bracon mellitor Say (fig. 6; 

 PI. XX, fig. 84). A single 

 specimen of another un- 

 doubtedly primary para- 

 site, Sigalphus curculionis 

 Fitch, was reared. A few 

 specimens of Catolaccus in- 

 certus Ashm. may ]3ossibly 

 have come from the weevil 

 larvae, but were more likely 

 hyperparasites. According 

 to the authority of Dr. Wil- 

 liam H. Ashmead, of the 

 United States National Mu- 

 seum, to whom the writer 

 is indebted for the specific 

 determinations and also for 

 information about the usual 

 habits of these parasitic insects, the following species, which were bred 

 from squares, must probably be credited to some other host than boll 

 weevil: Chalcis color adejisisCvQ^^, and Gomozi/.s platy7iotce Ashm. were- 

 probably upon lepidopterous larvae; Eurytoma sp. 2iwdi Ei(p>elmus spp. 

 16780— No. 51—05 10 



Fig. 



. — Bracon mellitor, parasite of boll weevil — much 

 enlarged (original). 



