354 TlMEHRI. 
to the species Stirastoma depressa ; while the yellow- 
spotted forms belong to the species Tseniotes farinosus. 
So far I have had no opportunity of tracing out the 
earlier stages in the life history of these forms ; and until 
this is done it will be impossible to suggest any remedies 
that are likely to be really effe6lual. It is probable that 
the beetles deposit their eggs in the young bark bored 
out for the purpose or in the inequalities of the old bark, 
though it is possible that they may be placed about the 
roots of the tree. In all of these cases, the " kerosene 
emulsion " is likely to be advantageous. This inse6l- 
destroyer is prepared by dissolving \ lb soap in one 
gallon of water and adding the mixture boiling-hot to 
two gallons of kerosene oil. The whole should be well 
churned by a force-pump, so as to ensure a perfect 
admixture, otherwise the constituents separate on 
cooling, and the stuff becomes unsuitable for appli- 
cation. Each gallon of the perfect mixture should then 
be diluted with nine gallons of water; and this strength 
is that which is generally applied to plants infefted with 
blight and scale-disease or inseft pests generally. The 
great recommendation of this mixture is found in the 
fa6l that while it is a most beneficial inseft-destroyer, it 
has no deleterious influence on the tree, if the ingredients 
are thoroughly mixed. All parts of the tree on which 
eggs or young grubs are detected should be thoroughly 
syringed ; though it would be advisable to test first the 
strength of the mixture, in case further dilution be 
necessary for the treatment of the tender shoots of cocoa 
plants. 
It is obvious that, as the adult beetles are the real 
offenders since the grubs hatch out from the eggs de- 
