NATURAL CONTROL. 141 



HYMENOPTERA. CHALCIDOIDEA. CHALCIDIDjE. 



Spilochalcis so. — A single male of this species was found dead in a 

 weevil cell with the remains of the weevil and its own exuvium 

 August 10, 1907, at Victoria, Tex. 



TORYMID.E. 



Microdontomerus anthonomi Crawford (PI. XVII, c). — This is one 

 of the most important parasites of the boll weevil in Texas and 

 Louisiana. It is generally found throughout the year and is known 

 to attack two other species of weevils. 



kckytomiii.e. 



Eurytoma tylodermatis Ashmead (PI. XVII, a, b). — This species 

 ranks among the five most important boll-weevil parasites, and its 

 range is practically coextensive with that of its host. It is known 

 to attack 14 other species of weevils. 



Euryt oma sp. — Two species of this genus were reared from hanging 

 squares collected August 10, 1907. at Victoria, Tex. 



Bruchovkcigus herrerse Ashmead.- This parasite has been recorded 

 from the boll weevil from Mexico, but the name is thought to be a 

 synonym of Eurytoma tylodermatis. 



PERILAMPIIhK. 



Perilampus sp. — A single individual was reared from the boll 

 weevil by isolation from material collected September 7, 1907, at 

 Shreveport, La., by Mr. C. E. Hood. Considerable doubt has been 

 raised concerning this record by authorities upon the breeding habits 

 of Perilampidse. 



ENCYRTID.E. 



Cerambycobius cyaniceps Ashmead (PI. XVIII, /). — The range of 

 this species is coextensive with the boll weevil in the United States. 

 It is extremely important in northern Louisiana and Arkansas, and 

 is known to attack 17 species of weevils. 



Cerambycobius cushmani Crawford. — This species is evidently 

 limited to southern Texas, where it is occasionally important. It is 

 known as a parasite of four other species of weevils. 



^ ( 'erambycobius sp.— On February 23, 1909, a male of a green species 

 of this genus was reared from a weevil in squares collected at Natchez, 

 Miss., on January 19. 



PTEROMALIDvE. 



Catolaccus hunteri Crawford (PI. XVII, e). — This is one of the most 

 important parasites of the boll weevil. It is of greatest importance 

 in Louisiana and Mississippi. Twelve other species of weevils are 

 known as hosts. 



Catolaccus incertus Ashmead (PI. XVII, /"')• — This is also a very 

 important species and occurs throughout the infested region. It is 

 also a parasite of 13 other species of weevils. 



Habrocytus piercei Crawford (PI. XVII, d). — This brilliant green 

 parasite has been reared from the boll weevil only in the fall and 

 winter months in Louisiana ami Texas. One other weevil host is 

 known. 



