374 REPORT UNITED STATES ENTOMOLOGICAL COMMISSION. 



(C), in which is a revolving fan which makes about 1,200 revolutions 

 per minute. The tubes and fan, with the gearing, are placed in a frame 

 (D) 5 by 10 feet, mounted upon two large driving-wheels (EE). 



Fig. 83.— The King Suction-machine : Front view. 



The air-current made by the revolving fan creates a suction at the 

 mouth, which draws the insects up the tubes and into the chamber. 

 They are then thrown by the fan upon a wire screen, and from thence 

 drop into a kind of hopper which conducts them to a bag. The wire 

 screen rapidly chokes up and must be frequently cleaned. Most of the 

 locusts are crushed and mangled by the rapidly revolving fan, so that 

 the screen may be removed entirely and the locusts thrown out behind. 

 This allows a freer draught and causes a greater suction. This machine 

 can be made for about 850, and it works well on smooth ground or in a 

 wheat-field while the wheat is yet short. It is somewhat difficult to keep 

 the lips close enough to the ground. The principle of the machine is a 

 good one, and we see no reason why some cheaper modification of it 

 should not be quite generally used early in the season, especially in 

 Colorado, where there is so much hard, smooth ground around the cul- 

 tivated fields. The lips might be protected and rendered less liable to 

 bend and get out of order by moving on runners made to extend some 

 distance in front. 



Finally, a machine which we saw in Colorado, and which was put up 

 by J. S. Flory, of Greeley, Colo., is worthy of mention in this connection; 

 for, while it may be used with coal-tar, it is essentially a catching and 

 crushing machine. The Colorado Sun thus speaks of it: 



The main feature of this invention is a revolving platform o: heavy canvas or ■wire- 

 cloth which runs between two horizontal i oilers. Long arms reach forward, which 



