78 



INSECT ENEMIES OF THE BOLL WEEVIL. 



Fig. 23. — The co^vpea weevil (Chalcodermus ameus), a cohost of 

 boll-weevil parasites. Enlarged. (From Chittenden.) 



Contrachelus juglandis LeConte. Tliis is the walnut weevil, wliich 

 is also parasitized by ^Iyiophasia ^nea, Cholomyia insequipes, Metd- 

 dexia hasalis, and Sigalphus curculionis. 



ConotracJielus elegans Say. This weevil breeds abundantly in 

 the petioles of hickory, the galls of Phylloxera devastatrix on pecan, 



in pecan nuts, in leaf 

 rolls on liickory, and 

 finally in the roots 

 of Amaranthus retro- 

 Jiexus. It is fre- 

 quently parasitized 

 by Myiophasia .^nea 

 and Sigalphus cur- 

 cuLiONis, and occa- 

 sionally by Cholomyia 

 insequijjes. 



Conotrachelus nen- 

 uphar Herbst. The 

 common plum curculio (fig. 24) breeds in the pulp of drupes and 

 pomes. The larvae are parasitized by Cholomyia inxquipes, Sigal- 

 phus CURCULIONIS, MicROBRACON MELLiTOR, and PoHzon conotracheli, 

 and the eggs by Anaphes conotracheli. 



Conotrachelus nasohe- 

 Conte. The common 

 acorn weevil is para- 

 sitized by Sigalphus 



CURCULIONIS. 



Tyloderma foveolatum 

 Say. This common wee- 

 vil breeds prolifically in 

 the stems of Onagra hien- 

 nis and Epilobium. It 

 is liighly parasitized by 

 Neocatolaccus tylodermx, 

 Cerambycobius cyan- 

 iceps, eurytoma ty- 

 lodermatis, microbracon mellitor, sigalphus curculionis, end 

 Urosigalphus sp. nov. 



Gerstseclceria nohilis LeConte (Acalles) . The common prickly-pear 

 weevil is parasitized by Catolaccus hunteri and by several other 

 species. 



Fig. 24. — The plum curculio ( Conotrachelus nenuphar), a cohost 

 of boll-weevil parasites: a, Larva; b, adult; c, pupa. Much 

 enlarged. (From Chittenden.) 



