234 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



often seriously injurious year after year. Should remedial treat- 

 ment be necessary, thorough dusting with Paris green or arsenate 

 of lead would probably destroy most of them, as the young cater- 

 pillars, like the bollworms, feed to some extent upon the foliage 

 before entering the squares. 



" Sharpshooters " or Leafhoppers * 



In late summer reports are frequent that cotton is being 

 injured by ''sharpshooters," especially on low land. These insects 

 are reported to puncture the squares and bolls, causing them to 



FIG. 196. Three cotton leaf hoppers commonly called sharpshooters: 

 a, Aulacizes irrorata; b, Oncometopia undata; c, Oncometopia lateralis 

 much enlarged. (Author's illustration, U. S. Dept. Agr.) 



drop "prematurely, a small black speck showing the spot where 

 punctured. The insect which has been most commonly credited 

 with this work is the Glassy-winged Sharpshooter,! but with it are 

 usually associated several near relatives with similar habits.J Few 

 planters are able to identify the cause of the supposed injury, but 

 many know these insects as "dodgers," from their habit of quickly 

 dodging to the opposite side of the stem when disturbed. Ex- 

 tensive observations and repeated experiments during two seasons 



* Family Jassidce. t Homalodisca triquetra Fab. 



J Oncometopia undata Fab., O. lateralis Fab., and Aulacizes irrorata Fab. 



