106 



Table XXVIII. — Breeding of parasites. 





Collector.. 







Weevils 

 bred. 



Parasites. 



Locality. 



Date. Squares. 



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 





1 





JW.D. Hunter.... 

 ]W. E.Hinds 



W.E.Hinds 



do 



> August 



1903. 

 June 













Do 



July 



1 



Do 



..do... 



August 



July, August 







Infested squares dried on 

 the plants. 



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. 4). A single 

 specimen of another un- 

 doubtedly primary para- 

 site, Sigalphus curculionis 

 Fitch, was reared. A few 

 specimens of Catolaccus 

 incertus Ashm. may pos- 

 sibly have come from the 

 weevil larvae, but were 

 more likety hyperpara- 

 sites. According to the 

 authority of Dr. William 

 H. Ashmead, of the 

 United States National 

 Museum, to whom the writer is indebted for the specific determina- 

 tions and also for information about the usual habits of these para- 

 sitic insects, the following species, which were bred from squares, 

 must probably be credited to some other host than the boll weevil: 

 Clialcis coloradensis Cress, and Goniozus platynotw Ashm. were prob- 

 ably upon lepidopterous larvae; Eurytoma sp. and Eupelmus, two 

 spp., usually attack dipterous larvae in galls and a number of speci- 

 mens of a species of Ooencyrtus may have been parasitic upon the 

 eggs of some lepidopteron or hemipteron, but certainly could not 

 have reached the eggs of the weevil. 



Fig. 4.-- -Bracon mellitor, parasite of boll weevil— much 

 enlarged (original). 



