1 66 First Report on Economic Zoology. 



(J) By collecting. 



Egg masses may be collected where plenty of native labour can be 

 obtained. 



The authorities in Cyprus in 1881 had 1300 tons of eggs collected by 

 natives at so much per pound. 



A look-out should be kept to see where the females deposit their eggs, 

 and those particular parts of the district should be searched soon after. 



B. 2. Machines for Catching Locusts (" Hopper Dozers "). 



These machines of various patterns resemble a shallow earth scoop or 

 long tray. They are largely employed in America in Locust plagues. 



A " hopper-dozer " is usually a flat iron or zinc tray, containing tar or 

 paraffin. This tray is dragged or pushed along by a horse or man against 

 the wind — the young locusts jumping out of the way get blown in, and are 

 thus killed. 



Fig. 18. — a hopper-dozer used for COIiLECTING LOCUSTS. 

 {After S. J. Hunter, Kansas). 



One machine mentioned in "Insect Life" is 15 feet long, 2 feet deep, 

 and 4 to 5 feet wide ; this box is divided into sixteen compartments filled 

 with lime water. 



A plan of one of the most recent and most successful machines used in 

 America is here appended. This machine was used by the Hon. Thos» 

 H. Tord, of Syracuse, U.S.A., and cost ready for use five dollars. 



The jjans should be 2 feet wide, 4 inches deep, and 8 inches at the 



