68 TREE FEOGHOPPER. 



Where " Froghoppers " are numerous they are likely 

 to cause much mischief to the shoots which they fre- 

 quent, by drawing away sap, and they also do harm by 

 means of the many small punctures caused by inserting 

 their suckers in the tender tissues. 



Sometimes they occur on grass (as in the case of the 

 Ptyelus lineatus, Linn., which was reported as being 

 very prevalent, in June of last year, on grass in meadows 

 and pastures, at a locality in New York State, U. S. A.*). 



The best method of prevention would be to find where 

 the eggs are laid, and destroy them. By keeping close 

 watch on trees usually infested, it would be found 

 whether the young Hoppers (wingless and very minute) 

 were first seen on the branches and shoots, or were 

 found at the lowest part of the trunk, as if crawling up 

 from below. This would probably be a guide as to the 

 class of preventive measures needed whether stirring 

 the soil, sticky-banding the lower part of the trees, or 

 cleaning the rough bark and dressing it so as to kill 

 vermin in crannies. 



In England it has been found a good way of getting 

 rid of the Hop Froghopper, the Euacanthus interruptus 

 (which is also one of the Cercopidcs, and sometimes very 

 mischievous on hops), to place a light metal tray or 

 piece of iron with a rim three inches high, well smeared 

 with wet tar close to the infested bines, one on each 

 side ; and on the bines being shaken, the Hoppers, 

 taking their great jumps in all directions, simply fell 

 into the tar, and thus a deal both of present and future 

 mischief was got rid of. Where infested fruit trees are 

 not of any great size, the plan of shaking or jarring, 

 so as to make the Hoppers leap on to cloths, or any- 

 thing below, smeared with wet tar, or with soft soap and 

 paraffin, or with anything that would poison or catch 

 the insects, would be likely to act well. E. A. 0. 



' Fourth Keport on Injurious Insects of the State of New York,' by 

 Dr. J. A. Lintner, State Entomologist. Albany, 1888. 



