462 



Annals Entomological Society of America [Vol. IV, 



To/da/rOjOre^O/r ^Sj T V> Idaho and 

 Montana 



Map 11. Showing distribution of Phytonomus postisus Gyll., in America 



and the principal railroads leading nut of the infected area. 



(Adapted from Titus, Bui. 110 Utah Agr. Exp. Sta.) 



The following account of its introduction into America and 

 its life history is condensed from that given by the author in 

 Bui. 110, Utah Exp. Sta. 1910, with some additional information 

 secured since that paper went to press and from an article in the 



