1.217. Thysanoptera. Only the Thrips belong to this 

 order. The wings are long, narrow, straight,, equal and vein- 

 less. These minute insects either fly or hop very vigorously. 

 Many flowers are attacked by thrips which with their biting 

 mouth keep chewing the delicate leaves and pollen grains. 

 The female is apterous i. <?., without wings. The males are 

 scarce, and propagation probably takes place by partheno- 

 genesis. The males are different in appearance altogether 

 from females. A minute black winged thrips has been noticed 

 spoiling the turmeric crop in Madras. Another thrips has 

 been reported as injuring the poppy in Behar where the in- 

 sect is called I hi or lehi. 



1. 2 1 8. Thysauneura. Wingless, mandibulate insects, 

 with long, many-jointed antennae, abdomen composed of ten 

 segments, and not undergoing metamorphosis. Not being 

 parasitic on plants they have no interest for students of 

 agriculture, though they are most curious animals. They 

 are covered with scales or hair. They have two or three 

 long caudal appendages. The " Silver-fish" or " Fish-insects" 

 (Lepisma) which are so destructive to books, are the com- 

 monest example of this order. 



1.219. 1 the succeeding Chapters we will give more 

 detailed description of the commonest agricultural pests and 

 treat each subject from the farmer's point of view. 



CHAPTER CXIV. 



LOCUST (ACRIDIUM PE)RB)GRINUM, A. SUCCINTUM, &C.) 



'TWERE are two important breeds of Indian locusts, the 



Rajputana (A. peregrinum) and the Deccan (A. succin- 



tum) breeds. The Rajputana locust usually breeds twice in 



the year, while the Deccan locust only once. The breeding 



