MIS C ELLA NEO US KO TES. 

 Dekra Dim, 191;5. 



199 



N.B. — Localities A — G were selected places in Dehra Dun where insects 

 were seen in plenty. 



The experiments were carried out in November and December during a 

 period when the eggs were hatching and the larvas were passing through 

 their different moults, but if this bait were utilised during the time when the 

 insects are most plentiful, 1 hope the above number would be much raised. 

 Mr. F. M. Howlett of the Agricultural Research Institute, Pusa, in his paper 

 on the Psychology of Insects,* comes to the conclusion that insects are to 

 be regarded " not as intelligent beings consciously shaping a path through 

 life, but as being in a sort of hypnotic trance, and when they are a pest it is 

 no intelligent foe we have to fight, but a mere batallion of somnambulists." 

 The bug on which kusum oil plays such an important part is Serinetlia auguv, 

 Fab., a member of the family Corieda, sub-family Corizince, Hitherto this 

 bug is not known as a pest to crops in India as informed by Mr. A. J. Grove, 

 Supernumerary Entomologist, Agricultural Research Institute, Pusa, to 

 whom my best thanks are due for the identification of this bug as well. 

 I think it would be interesting to make further observations to see if this oil 

 has similar fascination to any crop pests in India or elsewhere, for it would 

 then be an easy matter to fight with it by means of the kusum oil, just as 

 in the paper above mentioned. Prof. Howlett has tried to contend with 

 fruit flies using citronella as the bait. 



Dehka DtJN, 

 8th Mai/ 1915. 



N. C. CHATTER JEE, e. sc. 



Assistant to Forest Zoologist. 



Read before the General Malarial Committee at Madras in November 1912. 



