422 Journal of Agricultural Research vol. xx. No. 6 



In addition to the parasites mentioned above, Pierce (8, p. 8o) reports 

 the following Hyraenoptera as being parasitic on Sitophilus oryza: 

 Meraporus calandrae Howard, 1 M. utibilis Tucker, ' M . requisitus Tucker, 

 and Catolaccus incertus Ashmead. 



From Australia Mr. G. F. Hill (5) reports that he bred the two chalcids 

 Spalangiomorpha fasciatipennis Girault and N eocatolaccus australiensis 

 Girault l from grain infested with Sitophilus oryza. T. B. Fletcher (3) 

 reports that the adult beetle Tenebroides mauritanicus L> preys upon 

 adult weevils of Sitophilus oryza. 



CONTROL MEASURES 



Of the vast number of remedies that have been advocated for the con- 

 trol of this weevil the most effective agents now known are carbon 

 disulphid and heat. 



Infested grains should be fumigated in a gas-tight container or crib. 

 Four to 6 pounds of carbon per 1 ,000 cubic feet used in such a crib has 

 proved to be very effective in ridding the grain of the weevils. 



Where it is practicable to apply heat to the infested grain, this method 

 of control will prove very effective. A temperature of 11 6° F. main- 

 tained for two hours will kill all adults, and a temperature of 124 

 maintained for two hours will kill all stages from egg to adult. 



LITERATURE CITED 

 (r) Back, E. A. 



1919. CONSERVING CORN FROM WEEVILS IN THE GULP COAST STATES. U. S. 



Dept. Agr. Farmers' Bui. 1029, 36 p., 21 fig. 



(2) Fitch, Ed. A. 



1880. GRANARY WEEVILS: SITOPHILUS GRANARIES AND S. ORYZAE. In Amef. 



Ent., v. 3, no. 2, p. 41. 



(3) Fletcher, T. B. 



1916. agricultural entomology. In Ann. Rpt. Bd. Sci. Advice India, 

 1914-15, p. 148-162. 



(4) Gahan, A. B. 



1921. on the identity of several species of chalcidoidea. In Proc. Ent. 

 Soc. Wash., v. 22. In press. 



(5) Hill, G. F. 



1915. INSECT PESTS OF PLANTS, NORTHERN TERRITORY OF AUSTRALIA. Bui. 



North Ter., Aust., 13, 16 p. 



(6) Hinds, W. E., and Turner, W. F. 



191 1. LIFE HISTORY OF THE RICE WEEVIL (CALANDRA ORYZA L.) IN ALABAMA. 



In Jour. Econ. Ent., v. 4, no. 2, p. 230-236, 1 pi. 



(7) Linnaeus, Carolus. 



1763. amoenitates academicae ... v. 6. Lugduni Batavorum. 



(8) Pierce, W. D. 



1912. THE INSECT ENEMIES OF THE COTTON BOLL WEEVIL. U. S. Dept. Agr. 



Bur. Ent. Bui. 100, 99 p. , 26 fig. 



(9) Plautus. 



t96 b. c? curculio, or the forgery. 



1 Gahan (4) has pointed out that Meraporus utibilis Tucker and Meraporus calandrae Howard are both 

 identical with Lariophagus dislinguendus Foerster, and he also states that Girault has reduced Neocatolaccv s 

 australiensis Girault to synonymy with Aplastomorpha vandinei. 



