go First Report on Economic Zoology. 
on the crop, was not as great as one would expect. Amongst the potatoes 
mentioned were several of the large Ladybird ( Coccinella septemp unciata ) , 
which were feeding on the eggs of the beetle. It would be advisable to 
have all surrounding plots examined, especially those on the other side of 
the high fence separating the dockyard from the railway. As the beetles 
occur on poppies and tomatoes both these plants should be searched. 
Report of Second Visit to Tilbury re Colorado Beetle. 
On September 17th, 1001, I visited Tilbury with Mr. Craigie to make 
further examination of the allotments upon which the Colorado Beetle had 
been found breeding. 
No signs of any fresh beetles had been noticed by the foreman who 
had charge of the plot of land. None could be found under boards, 
sacking, etc., places where they might hibernate. It is extremely 
improbable that any could live in the ground covered with the gas lime 
in the way it has been treated. No signs of any damage could be detected 
on the potatoes, not yet dug, on the railway bordering the infested patches 
in the docks. 
There is a possibility that a few stray individuals might live in amongst 
the rough grasses near the plots, which although treated with gas lime, 
still offer many tempting spots for wintering where the lime has not 
fallen. 
It would be well to plant a few batches of early potatoes about, as 
traps for any that may have escaped ; this would probably stop any 
stragglers in the spring from straying away. 
The specimens taken away at my first visit have now all gone to earth. 
On placing them amongst fresh leaves and on the soil, even in the sun, they 
refuse to remain above ground. These will be kept as checks, and as soon 
as they commence to appear in the spring from the soil, information will 
be sent to the Board, when a sharp look-out may be kept at Tilbury. For 
the present nothing further can be done. 
Report on the Colorado Beetle at Tilbury (1902). 
I have visited the plot of land in Tilbury Dock upon which the 
Colorado Beetle bred last summer, and found that the beetles were 
appearing in small numbers and that they had already commenced to lay 
their eggs (June 2nd). As stated by Mr. Brown, the beetles were coming 
out of the ground that had been treated with gas lime and paraffin during 
August, 1901. 
The beetles seen by me were quite fresh specimens and presented a 
much brighter shiny appearance than those I kept alive during the winter 
at Wye ; one specimen found during my visit on June 2nd was certainly 
immature. It thus seems that these beetles that are now appearing have 
passed the winter in the pupal stage. The larvae had no doubt gone to 
earth before the land was treated last autumn. A number may well have 
gone deeper than 10 inches,* so that they would escape the action of the 
gas lime and paraffin, and thus the appearance of the beetles this year can 
be accounted for. 
* The land was only ploughed to this depth. 
