TOBACCO 269 



tioned that the Deli Testing Station, as a subsidiary 

 meteorological station of the observatory at Weltevredes, 

 collects, and causes to be collected, meteorological par- 

 ticulars regarding : 



(1) The rainfall. 



(2) The temperature. 



(3) The relative moisture. 



(4) The sunshine. 



(5) The evaporation. 



(6) The atmospheric pressure. 



The rainfall data are obtained from 350 rain stations 

 spread over the cultivated region of the East Coast of 

 Sumatra, which forward their figures monthly to the 

 Testing Station, to be published by it annually in the 

 Chronicles. Of a large number of these stations, the 

 elevation above sea-level, the distance from the coast, 

 and the geographical position are accurately known. 



The other particulars are ascertained at Medan, in the 

 experimental grounds of the Deli Testing Station, by 

 means of self-registering- and other instruments; the 

 monthly statements relating' to these are no longer pub- 

 lished, but are kept at the testing- station at the disposal 

 of persons interested; at the end of each year, however, 

 the monthly averages are published. 



(i) Zoological Department. 



The Zoological Department of the Deli Testing Station 

 has for its object the study of noxious animal life and the 

 discovery of means to combat them, as well as the ex- 

 perimenting with useful animal life, and where necessary 

 the introduction and incorporation thereof in the tobacco- 

 growing region. 



The most important pests are : 



Leaf-eating caterpillars: Chloridea (Heliothis) obso- 

 Icta, Prodenia litura, Plusia sp., Botys marginalis. 



Gall-forming caterpillar: Phthorimsea (Lita) solanella. 



Green-fly: Aphis sp. 



Ants. 



Beetles: Opatrum and its larva, the needle worm, 

 Lasioderma, Heterodera. 



Green lug: Nezara. 



