34 PABA6ITES OF THE. COTTON BOLL WEEVIL. 



The breeding records of the parasite are as follows: 



Table XXI.— Breeding records of Microdontomerus anthonomi. 



Locality. 



Date. 



Total. 



As primary As BeCOndary 

 parasites. parasites. ' 





Male. 



Female. 



MaL . 



Female. 



Male. 



Female. 



Cuero, Tex 



1906. 

 August 31 



? 



1 



I 



3 









l 

 l 



Halh-ttsvillr. Tex... 

 Waco, Tex 



Do ...."; 



September 3 



August 30 



August 28 



August 29 







i" 



""4" :::::::: 



2 



3 1 







2 



11 



l 



9 



1 



2 



Thirteen parasites were bred, of winch 23 per cent were secondary. 

 Owing to numerous expressions of incredulity concerning this dual 

 parasitism it may be proper to state the proofs. In the first place 

 primary parasitism has been thoroughly established in the case of 

 this species and also in the case of Eurytoma tylodermatis and Ceram- 

 bycohus cyaniceps. Adults have been bred from larva? which were 

 actually observed to be feeding upon the weevil larvae. The devel- 

 opmental period of those adults bred precludes any arguments that 

 they were bred from unobserved eggs of parasites on the larvae. In 

 the second place, the Bracon and chalcidoid larvae are very easily 

 distinguished, so that the notes in most cases stated whether the 

 larva observed was a Bracon or a chalcidoid. In no case was one of 

 the latter bred from a Bracon except when the Bracon cocoon was 

 already formed at the time of the observation. Finally, secondary 

 parasitism was proved because the parasites were actually bred from 

 isolated Bracon cocoons, which were subsequently opened and from 

 which the known exuvia of the secondary parasites were removed. 



2. Eurytoma tylodermatis Ashm. This species was bred by Town- 

 send in 1895 and by Mally during several years from the boll weevil. 

 Ashmead described it as a parasite of Tyloderma foveolatum Say 

 (Ashmead, 1896), a weevil breeding in the stems of Onagra biennis 

 and also in a species of Epilobium. It was reared by F. H. Chitten- 

 den from the larva of Tyloderma foveolatum Sav in stems of Onagra 

 biennis, September 23, from material collected at Rosslyn, Va. 



This species was bred by the writer from Anthonomus'disjunctus 

 Lee. breeding in the heads of Heterotheca subaxillaiis at Jacksonville, 

 Tex., October 13, 1905 (1 male); from Anthonomus squamosus Lee, 

 breeding in the heads of Grindelia squamosa nuda at Clarendon Tex 

 September 22, 1905 (6 females), and September 26, 1905 (2 males) \ 

 from Orthoris crotchii Lee. breeding in the seed pods of Mi ntzelia nuda 

 at ( larendon, Tex., October 2, 1905 (1 male); and from Lixus mus- 

 culus Say, winch forms galls in the stems of Polygonum Pennsylvania 

 cum, at Clarendon, Tex., October 2, 1905 (2 females), and October 17, 

 190o (1 male). Mr. W. W. Yothers bred this Eurytoma from Lixus 



