62 



INSECT ENEMIES OF THE BOLL. WEEVIL. 



In order to show the regions in which the various species are of 

 greatest importance, the accompanying map (fig. 14) is presented. 

 This shows that while Ilicrohracon mellitor has yielded more individuals 

 than the other species, it is the predominating parasite in by far the 

 larger proportion of the infested territory. It can also be seen that 

 much more can be expected from the other parasites as the weevil 

 moves eastward into their territory. Microdontomerus anthonomi is 

 quite important throughout the central black-prairie region of Texas. 

 Eurytoma tylodermatis is more important in north-central Texas and 

 also in the coast region of Texas. Ceramhycohius cushmani is charac- 



1906 



1907 



<l g I c/ l> 



1908 



1909 



C/ITOiyiCCUS f*U/VT£R/ 



Fig. 13.— Diagram illustrating yearly rank of the boll weevil parasites, 1906, 1907, 1908, and 1909. 



(Original.) 



teristic of the counties grouped around Victoria County, Tex., but a 

 few specimens have been reared from the boll weevil at Alexandria, 

 La., by Messrs. Cushman and Jones. 



9. THE PARASITE SEASONS. 



For the convenience of this work on parasites of the boll weevil, 

 the year has been divided into definite parasite seasons correspond- 

 ing with certain groups of conditions. The year opens with the 

 Jiihernation period well underway. In so far as the parasites are 

 concerned those which hibernate as immature insects mature gen- 

 erally about the middle of March. This marks the end of the hiber- 



