66 Indian Museum Notes. [ Vol. VL 



descend the trees in search of suitable places of concealment in which 

 to place their eggs. With good sticky bands upon all the trees it 

 should be possible to capture and kill off a large percentage of these 

 females before they egg-lay. It is very probable that many, when 

 they find themselves entrapped by the band, will oviposit there. It 

 will be advisable therefore to visit the bands fairly often and remove 

 and burn the scale insects sticking to them. In the case of a severe 

 attack this visit should be made daily or the insects might in time 

 bridge the band with their dead bodies over which the living would 

 then cross. In putting on the bands deep furrows or inequalities in 

 the bark should be scraped down so that the sticky substance 

 used may form a continuous ring round the tree. This is abso- 

 lutely essential as any channel left unbanded will certainly be found 

 out and used by the insects to escape the ring. When the 

 attack is over the bands should be carefully scraped off and the scrap- 

 ings burnt. The reason for this is that each band will almost cer- 

 tainly contain a number of eggs laid by the entrapped females. 

 As long as these eggs remain in the sticky band they are harmless, 

 but it is probable that the monsoon rains would soon wash them out, 

 and many might thus reach a place of safety and hatch out in the 

 ordinary course. 



3. The third remedy advocated is to introduce a predaceous 

 lady-bird beetle into the orchard. The beetle and its grub will 

 feed upon the scale and reduce its numbers, To render this method 

 of remedial measure effective, it will be necessary for the owner of 

 the orchard to apply to an expert for help. Before such an applica- 

 tion is made, however, the owner should keep a careful watch in his 

 orchard to see whether such an insect is not already present feeding 

 upon the scale. Plate III, figs. 11, 11a, lib, 11c shows the grub and 

 adult insect of the beetle known as Vedalia guerinii which feeds 

 upon the monophlebus of the sal tree, of which the mango insect is 

 only a variety. It is therefore probable that this insect would feed 

 upon the mango Monophlebus. But this latter scale already has a 

 predaceous coccinellid grub feeding upon it, of which the beetle is as 

 yet unknown. This grub is shown PL III, figs. 12, 12a, 



The mango Monophlebus has been reported from the Shalimar 

 Gardens near Lahore and the Bareilly public gardens. Species, 

 probably identical with it, also from Dalsing Serai (Tirhoot), 

 Darbhangha. 



Points in the life-history requiring further study. 



(a) What becomes of the insect between the beginning of May, 

 after egg-laying has been completed and the male and 



