48 INSECT ENEMIES OF THE BOLL WEEVIL. 



On September 12, 1906, in dry hanging bolls collected at Dallas, 

 Tex., a weevil larva was found parasitized and isolated in a separate 

 tube, with the following record: ''Very small parasite larva on small 

 weevil larva/' On September 26 a single specimen of Ai)liiochxta 

 nigriceps Loew was reared and the following note made by the 

 senior author: ''Found dipterous puparium, skin of hauy para- 

 site larva (may be the dipteron or a hymenopteron) ; also remains 

 of weevil larva." On October 6, 1906, in hanging bolls collected 

 at Dallas a weevil larva was isolated with the note, "Weevil larva 

 full of dipterous larvse." Eleven larvse left this host larva and 

 pupated. On October 29, 7 ApJiiochseta ( ?) fasciata Fallen and two 

 A. pygmsea Zetterstedt were reared. At least the latter case seems to 

 be very strong evidence of primary parasitism. These flies are reared 

 frequently from boUs and many are perhaps scavengers. Two other 

 species, A. epeirse Brues and A. scalaris Loew, have also been reared 

 from cotton forms at Calvert, Tex. Kecords made in 1911, at Tal- 

 lulah. La., by Mr. Harry Pinkus, point conclusively to primary 

 parasitism. 



TACHINID^. 



MyiopJiasia senea Wiedemann is recorded from a number of very 

 important weevils. Of these, Balaninus nasicus Say (the acorn 

 weevil), Conotrachelus juglandis LeConte(the walnut weevil) , ^m^e- 

 loglypter sesostris LeConte (the grapevine gall-maker), Conotrachelus 

 affinis Boheman (the hickory-nut weevil), and Conotrachelus elegans 

 Say (the pecan-gall weevil) are all weevils which enter the ground for 

 pupation, carrying their parasites with them, and consequently it 

 becomes necessary for the flies to emerge from the weevil cell through 

 several inches of earth before attaining freedom. The only weevils 

 which this fly attacks and which do not enter the ground for pupation 

 are the boll weevil and Trichoharis compacta Casey (the Jamestown- 

 weed pod weevil). Very few records have been made to ascertain 

 its developmental period, but the three records at hand indicate from 

 22 to 29 days as the period from collection of the infested material 

 to the maturity of the fly. This period would cover largely the under- 

 ground period only. 



Ennyomma (Loewia) glohosa Townsend. Several specimens of 

 this fly were reared during 1907 by Mr. C. R. Jones at Alexandria, 

 La., as primary parasites of the boll weevil. It is a very common 

 parasite of Chalcodermus seneus Boheman (the cowpea-pod weevil) 

 in the Southern States. 



5. THE HYI^IENOPTEROUS PARASITES OF THE BOLL WEEVIL. 



So much information has been gained concerning the hymenopter- 

 ous parasites of the boll weevil that it will be necessary to omit 

 many of the technical facts learned about them. The present sec- 



