HYMENOPTEROUS PARASITES OF THE WEEVIL. 



49 



tion is concerned with the sources of the parasites and with important 

 records of their occurrence, wliilc llic otlier interestinfj facts to be 

 presented are inchuled in the five following sections: 



CIIALCIDOIDEA. CHALCIDID^. CHALCIDIN^. 8MICRINI. 



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

 weevil cell with tlic remains of the weevil and its own exuvium in a 

 hanging square collected August 10, 1907, at Victoria, Tex. 



TORYMID.E. MONODONTOMERIN^. 



Microdontomerus anihonomi Crawford (fig. 9). BracJiytarsus alter- 

 natus Say was formerly the onty weevil recorded as a host of this 

 species. A male and female of this parasite were reared on Septem- 



¥iG. 9.— ^ficrodontomeTus anthonomi: Adult. Much enlarged. (Original.) 



ber 12, 1907, from pods of the flowering shrub AmorpTia fruticosa, at 

 Dallas, Tex., which were highly infested by (Bruchus) Laria exigua 

 Horn. In 1906, in which year this parasite was first discovered, it 

 ranked as seventh species in importance as a boll-weevil enemy. 

 In 1907 it advanced to fourth place and was very important in the 

 central black-prairie region of Texas. In 1909 the easternmost 

 limit of our records was Tallulah, La., which did not become infested 

 by the boll weevil until 1908. 



EURYTOMID.E. EURYTOMINI. 



Eunjioma iylodermatis Ashmead {BruchopTiagus Tierrerx Ashmead). 

 This is without doubt one of the most important species under 

 consideration, having a range of distribution practically coexten- 



16844°— Bull. 100—12 4 



