78 



IN"SECT ENEMIES OF THE BOLL WEEVIL. 



Fig. 23.— The cowpea weevil {Chalcodermus seneus), a cohost of 

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



Contraclielus juglandis LeConte. Tliis is the walnut weevil, wliich 

 is also parasitized by Myiophasl\ ^nea, CJiolomyia insequipes, Meta- 

 dexia hasalis, and Sigalphus cukculioxis. 



Conotrachelus elegans Say. This weevil breeds abundantly in 

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



in pecan nuts, in leaf 

 rolls on hickory, and 

 finally in the roots 

 of Amaranthus retro- 

 jiexus. It is fre- 

 quently parasitized 

 by Myiophasia ^nea 

 and Sigalphus clti- 

 cuLioxis, and occa- 

 sionally by OJioJomyia 

 insequijpes. 



Conotrachelus nen- 

 uphar Herbst. The 

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

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

 phus cuECULiONis, MicROBRACOx MELLiTOR, and Povizon conotracheli, 

 and the eggs by Anaphes conotracheli. 



Conotrachelus naso Le- 

 Conte. The common 

 acorn weevil is para- 

 sitized by Sigalphus 



CURCULIOXIS. 



Tyloderma foveolatum 

 Say. This common wee- 

 vil breeds prolifically in 

 the stems of OnagraMen- 

 nis and Epilobium. It 

 is Ifighly parasitized by 

 Neocatolaccus tylodermse, 

 Ceraj^ibycobius cyax- 

 iceps, eurytoma ty- 

 lodermatis, microbracox mellitor, sigalphus clticulioxis, and 

 Urosigalphus sp. no v. 



GerstsecJceria nohilis LeConte {Acalles). The common prickly-pear 

 weevil is parasitized by Catolaccus huxteri and by several other 

 species. 



Fig. 24. — The plnm curculio ( ConoiraeMus nenup?iar),& cohost 

 of boll-weevil parasites: a, Larva; 6, adult; c, pupa. Much 

 enlarged. (From Chittenden.) 



