102 



189. , and Mitchell, H. C. 1968. Parasites of the boll weevil in Mexico. 

 VI National Entomological Congress Organized for the Society of 

 Mexican Entomology, 23-26 October 1967. Folia Entomol. Hex. 18-19: 24. 



Over 40 species of arthropods have been reported as parasitizing the boll 

 weevil ( Anthonomus grand is Boheman) throughout its range. Of these about 

 14 species are now known to occur naturally in Mexico. Most records are of 

 a qualitative nature and for a limited number of localities. A tarsonemid 

 mite, Pyemotes ventricosus (Newport), has been reported attacking the boll 

 weevil in areas of northern Mexico. All others found have been in the insect 

 order Hymenoptera. The following have emerged from boll weevil infested cotton 

 squares or bolls from one or more localities in Mexico: the braconids 

 Urosigalphus schwarzi Crawford//, Aliolus curculionis (Fitch) #, Bracon mellitor 

 Say, and Bracon sp.: the ichneumonid Calliephialtes thruberiae Cushman, the 

 eulophid Tetrastichus hunteri Crawford//; the eupelmid Eupelmus sp.#; the 

 torymid Microdontomerus anthonomi (Crawford)//; the pteromalids tleterolaccus 

 grand is Bruks. Heterolaccus hunteri (Crawford), and Zatropis incertus (Ashmead) 

 if; and the aurytomids Eurytoma herrerae (Ashmead) and Eurytoma tylodermatis 

 Ashmead//. (//Seven of these species are here reported apparently for the first 

 time in Mexico.) 



190. , and Mitchell, H. C. 1969. Distribution and importance of 

 HeterolSccus grandis as a parasite of the boll weevil. J. Econ. 

 Entomol. 62: 235-236. 



The known distribution of Heterolaccus grandis Burks, a pteromalid parasite 

 of the boll weevil, Anthonomus grandis Boheman, was extended from the ori- 

 ginal type-locality in Nicaragua to Costa Rica, Guatemala, and 3 States in 

 Mexico. Observations since 1961 indicate that H. grandis may be the most 

 important parasite of the boll weevil on the Pacific slope of Mexico and 

 Cent^ral America. The most recent record establishes the occurrence of H. 



