Tobacco sprays for Chinch-bug in 

 Corn, limitation as to profitable use 

 of, 107. 



Tree of Heaven, May-beetles collected 

 from, 58. 



tristis, Phyllophaga, 37, 61, 63. 



vehemens, Phyllophaga, 28, 37, 39, 45, 

 46. 



Vers blancs, 57. 



Viburnum as food plant of May-bee- 

 tles, 40, 58, 60. 



villifronSj Phyllophaga, 42. 



virginicum, Andropogon, 98. 



Walnut as food plant of May-beetles, 

 31/34, 58, 59, 60, 63. 

 Black, as food plant of May-beetles, 

 29, 37, 38. 



Wheat and Oats, estimated injury to, 

 by Chinch-bug in 1914, 71, 74. 



fields, insecticide sprays in, for de- 

 struction of chinch-bugs, 105-110. 



harvest, destruction of chinch-bugs 

 at, 99. 

 White-grubs, abundance of, varying 

 with distance of fields from trees, 

 66-67. 



and May-beetles, parasites and dis- 

 eases of, 57, 65. 



extensive collecting of, 66-67. 



influence of trees and crops on in- 

 jury by, 66-70. 



injuries by, 33, 35, 38. 



(See also May-beetles and Phylloph- 

 aga.) 

 Willow as food plant of May-beetles, 



29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 



39, 40, 41, 42, 43, 44, 45, 46, 58, 59, 



60, 61, 63, 64. 



