80 



INSECT ENEMIES OF THE BOLL WEEVIL. 



Ampelogh/iHer sesostris LeConte. The grapevine gall weevil is para- 

 sitized by Myiophasia ^nea, Neocatolaccus tylodermx, and Calyytus 

 tihiator. 



Ziigoharis xanihoxyli Pierce. This weevil is abundant in the berries 

 of Xanthoxylum clava-Jierculis. It is parasitized by Catolaccus 



HUNTERI and SiGALPHUS CURCULIONIS. 



BALANININ^. 



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

 sitized by Myiophasia ^nea and possibly by Trichacis rufipes. 



CALANDRIN^. 



Calandra oryza Linnaeus. The cosmopolitan rice and corn 

 weevil (fig. 26) breeds in acorns of several species of oak, in galls of 



Phylloxera devastatrix on Hicoria 2)ecan, in 

 old cotton bolls, and in all kinds of stand- 

 ing and stored grain. It is parasitized by 

 Meraporus calandrse, M. vandinei, M. uti- 

 hilis, M. requisitus, and Catolaccus in- 

 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 boll weevil, the following list 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 virginicus 



Zca mats (corn)-. 



Oryza satha (rice) 



Juglans nigra (walnut) 



Hicoria sp. (hickory) 



Hicoria alba (hickory) 



Hicoria pecan (pecan) 



Quercus spp 



Phoradendron fiavescen^ 



Polygonum pennfylvaniaim 

 Polygonum portoricense 



Polygomim punctatum. . . . 



Avfiaranthus retrojlexus. 



Infested by- 



Calandra oryza I.. 



Anthribus alternatus Say. 

 (Arsecerus fa^iciculatus DeG. 

 [Calandra oryza L. 



Calandra oryza. 



Conotrachdiis juglandi^ Lee. 



Conotrachelus ajjini.>i Boh. 



Conotrachelus elegans Say. 



Conotrachelus elegans. 



I Balaninus spp. 

 Conotrachelus naso Lee. 

 Calandra oryza Ij. 

 Smicraulax tubercidatii^ Pierce. 

 Lixus musculus Say. 

 Lixus munciihts. 

 (Lixus musculus. 

 \Rhinoncus pyrrhopus Boh. 

 Conotrachelus elegans Say. 



