OP. THE BAKU AND GAEDEK. 277 



are used to drag them. The majority of the insects per- 

 ish within the pans, which must be occasionally emptied. 

 If some of the locusts jump out, it is of little conse- 

 quence, as all that have been touched by the oil will soon 

 die. In Colorado they use kerosene to good advantage 



Fig. 163.— COAL-TAB PAN FOR CATCHING LOCUSTS. 



on the water in their irrigating-ditches, and it may be 

 used anywhere in pans or on cloths, stretched on frames 

 and saturated with it, to be drawn over the field. 



DESTRUCTIOIf OF THE YOUNQ OE UnFLEDGED LoCUSTS. 



1st. BuENiNG. — This method is perhaps the best in 

 prairie and wheat-growing regions, which compose the 

 larger part of the area subject to devastation by this lo- 

 cust. In such regions there is usually more or less old 

 straw or hay that may be scattered over or around the 

 field in heaps and windrows, and into which the locusts, 

 for some time after they hatch, may be driven and 

 burned. During cold or damp weather they congregate 

 of their own accord under such shelter, when they may 

 be destroyed by burning, without the necessity of previous 

 driving. Much has been said for and against the benefi- 

 cial results of burning the prairies in the spring. This 



