80 



IN"SECT ENEMIES OF THE BOLL. WEEVIL. 



Ampeloglypter sesostris LeConte. The grapevine gall weevil is para- 

 sitized by Myiophasia jsnea, Neocatolaccus tylodermse, and Calyptus 

 tibiator. 



Zygoharis xanthoxyli Pierce. This weevil is abundant in the berries 

 of Xanthoxylum clava-Tierculis. It is parasitized by Catolaccus 



HUNTERI and SiGALPHUS CUECULIONIS. 



BALANININ.E. 



Balaninus nasicus Say. This weevil breeds in acorns. It is para- 

 sitized by Myiophasia ^nea and possibly by Trichacis rujipes. 



CALANDRIN^. 



Calandra oryza Linnseus. The cosmopohtan rice and corn 

 weevd (fig. 26) breeds in acorns of several species of oak, in gaUs of 



PJiylloxera devastatrix on Hicoria pecan, in 

 old cotton boUs, and in aU kinds of stand- 

 ing and stored grain. It is parasitized by 

 Meraporus calandrse, M. vandinei, M. uti- 

 hilis, M. requisitus, and Catolaccus ix- 

 CERTUS. Other parasites have been re- 

 ported abroad. 



15. a LIST OF THE HOST PLANTS OF THE 

 COHOST WEEVILS. 



In order to show more plainly the num- 

 ber and variety of plants whose presence around the cotton field, 

 if infested by their typical weevils, would influence the parasite 

 control of the boU weevil, the following hst is presented, using the 

 classification of Britton (1901) : 



Fig. 26.— The rice weevil {Calandra 

 oryza), a cohost of boll-weevil 

 parasites. Enlarged. (From 

 Chittenden.) 



Plant. 



Triticum sativum (wheat). . 

 Elymus xirginicus 



Zea mais (corn) . 



Oryza mtiia (rice) 



Juglans nigra (walnut) 



Hicoria sp. (hickory) 



^Hicoria alba (hickory) 



Hicoria pecan (pecan) 



Quercus spp 



Fhoradendron fiavescens 



Polygonum pennsyhamcum 

 Polygonum portoricense 



Polygonum punctatum 



ATnaranthus retrojlexus 



Infested by- 



Calandra oryza J.. 



Anthrihus alternatus Say. 

 f Arsecerus fasciculatus DeG. 

 \Calandra oryza L. 



Calandra oryza. 



Conotrachelus juglandis Lee. 



Conotrachelus affinis Boh. 



Conotrachelus elegans Say. 



Conotrachelus elegans. 



f Balaninus gpp. 

 Conotrachelus na?o Lee. 

 Calandra oryza L. 

 Smicraulax tuber culatus Pierce. 

 Lixus musculus Say. 

 Lixus musculus. 

 {Lixus musculus. 

 [Rhinoncus pyrrhopus Boh. 

 Conotrachelus elegans Say. 



