June, 21] FORD and larrimer: grasshoppers and baits 291 



This table shows that in every case sawdust and wheat bran mixed 

 in equal parts attracted more grasshoppers than did the sawdust alone. 

 The hoppers attracted to the four mixtures containing only sawdust 

 totaled 6459 while those counted from the four containing 50% bran, 

 totaled 8845, which shows an increase in attractiveness of 36.9% due 

 to the use of 50% bran. The mixture containing bran abne headed 

 the list with 2522 hoppers but this was only 311 or 14% more than the 

 average of the four mixtures containing bran and sawdust in equal por- 

 tions. The bait made from horse manure fell far below any of the 

 rest, showing that its attractive power for grasshoppers is compara- 

 tively low. 



Table X shows the conditions of temperature and humidity for the 

 days on which the preceding experiments were run. 



Table X - Temperature and Humidity Records. LaFayette, Indiana. 



Date 6 A.M. 8 A.M. 10 A.M. 12M. 2 P.M. 4 P.M. 6 P.M. Min. Max. Mean 

 1919 T. H. T. H. T. H. T. H. T. H. T. H. T. H. T. H. T. H. T. H. 



T = Temperature 

 H = Humidity 



Conclusion 



The data herein reported indicate the following :- 



1. Fruit flavors in bran mash when used against M. femur-rtibrum 

 under Indiana conditions, at least, apparently are not necessary. 



2. Black strap molasses was found to be the best of the flavor com- 

 binations used. 



3. Salt does not add to the attractiveness of poison bran mash. 



4. Black strap molasses was better than any of the syrups herein test- 

 ed, all others being only slightly better than wet bran alone. 



5. Sawdust and bran used in equal parts as a body material for mash 

 attracted 36.'9% more hoppers than sawdust alone. 



6. Sawdust and bran used in equal parts as a body material for bran 

 mash attracts nearly as many hoppers as wheat bran alone. 



