140 



IOWA ACADEMY OF SCIENCE Vol.. XXVI, 19i9 



I1ie catch should be thoroughly drained and then spread out in 

 quite thin layers in the sunshine, on bare ground or closely cut grass. 

 Thorough drying requires one to three days depending upon the 

 intensity of the sun, wind, etc. If stack covers, other tarpaulin or 

 large pieces of burlap are available the hoppers may be spread on 

 these, which offers a chance to keep them clean and to take them up 



Fig. 3 7. — One peck freshly caught grass-hoppers. Net weight ten pounds. 



quickly with the minimum loss. It is well to stir the drying hoppers 

 with a garden rake once or twice a day to facilitate drying. The 

 kerosene evaporates and in no way interferes with the use of the 

 hoppers as feed. Gasoline was found to work slightly less satisfac- 

 torily in the machine and to ofifer no advantage over the kerosene 

 when it came to drying. 



A bushel of grass-hoppers as caught in the hopper-dozer weigh 

 when thoroughly drained forty pounds. A lot of grass-hoppers 

 caught at Salem, Iowa, August 27, 1919, many of which were adults. 



