145 



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

 made somewhat uncertain because of the impossibilit}^ of isolating 

 the weevil larvse. A condensed summary of the results in breeding^ 

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



Table 'X.'L.-^Breeding of parasites. 





Collector. 



Date. 



Squares. 



Weevils 

 bred. 



Parasites. 



Locality. 



Bracon 

 mellitor. 



other 



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 



rW. D. Hunter .... 

 \W. E.Hinds 



W.E.Hinds 



do 



>August 



1903. 

 June 



0> 



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 



& 











From these observations it appears that 24.4 per cent of the 5,54§ 

 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 possibly 

 have come from the weevil 

 larvse, 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 fig. 

 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 ade7isis Cress, and Goniozus platynotw Ashm. were^ 

 probably upon lepidopterous larvae; Eurytoma sp. 2iX\di Ewpelmus spp. 

 16780— No. 51—05 10 



-Bracon mellitor, parasite of boll weevil — much 

 enlarged (original). 



