PLATE XLII. 



Map of Kansas, showing' the location and distribution of ShuiiUiiiii 

 flies. A complete survey of Kansas for Simulium has not been made, but 

 the survey that has been made to date as shown by the map would indi- 

 cate that Si'mnliniii flies are generally distributed over the state where 

 there are year-round flowing streams of water. S, location of Simnliiim. 



