542 



SOME SOUTH INDIAN INSECTS, ETC. 



sometimes in or alongside the nests of other Termites, show no 

 outward indication of their position and are almost impossible to 

 locate. 



The only method of mitigating damage, that can be suggested 

 at present, is by the use of deterrents, whose use often gives young 

 plants time to reach a point of growth at which they are little 

 attacked. Where irrigation is practicable a bag of Crude-oil 

 Emulsion suspended in the irrigation-channel will usuallj drive 

 Termites away temporarily. Cane setts may be dipped in a solution 

 of Copper Sulphate before planting. Methods adopted for special 

 crops must depend very largely on local conditions. 



THYSANOPTERA. 



THR1PID/E. 

 THRIPS. 



I ic $37.—Thrips. The hair-lines show the natural sizes, I \fto i I 



Various species of Thrips (Sensu latiori) occur in Southern 

 India on various crops, such as cholam, paddy, onion, sugarcane, 

 and groundnut, but the species concerned are very little known 

 and c.mnnt be discriminated without careful study. The damage 

 done is usually small so far as particular plants are concerned, but 

 is undoubtedly large in the aggregate, and further study of these 

 minute insects will probably reveal that many different species 



