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 eveninof. 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 

 FIG. iis. — FOREST TENT-COCOONS SO as to twlst the web 



IN APPLE LEAVES. , . ^j^, 



about It. 1 he cater- 

 pillars should then be burned or crushed. 



4. T/ie Forest Toit-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 



