106 



Table XXVIII.— Breeding of parasites. 



From these observations it appears that 24.4 j)er 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 curcuUonis 

 Fitch, was reared. A few 

 specimens of Catolaccus 

 incertus Ashm. may pos- 

 siblj^ have come from the 

 weevil larvae, but were 

 more likelj^ hyj)erpara- 

 sites. According to the 

 authority of Dr. William 

 II. 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 platynoke Ashm. were prob- 

 ably upon lepidopterous larv?e; Eurytoma sp. and Eupelmus, two 

 spp., usually attack dipterous larv?e 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. 



Pig. L— Bracon mellitor, parasite of boll weevil— miich 

 "enlarged (original). 



