328 



AGRICULTURE. 



and orioles (Fig. 117), serve as natural checks 

 to these insects, but they are by no means 

 sufficient to prevent them from doing great 

 damage. 



Every farmer should take prompt measures 

 to destroy them at their first appearance upon 



his trees. This may 



be done effectively 

 by spraying the foli- 

 age with arsenate of 

 lead, or Paris green, 

 or by collecting them 

 in their tents early in 

 the morning or late 

 in the evening. This 

 maybe done by thrust- 

 ing into the tent the 

 end of a long pole, 

 into which has been 

 driven two or three 

 nails, and turning the 

 pole round and round 

 so as to twist the web 

 about it. The cater- 

 pillars should then be burned or crushed. 



4. The Forest Tent-caterpillar (C. disstria] 

 is very like the American tent-caterpillar in 

 appearance and habits. The markings upon the 

 wings of this moth are dark instead of light, while 

 in the caterpillar (Fig. 119) the median line is 



FIT.. IlS. FOREST TENT-COCOONS 



IN A1TI.K LEAVES. 



