IN NICARAGUA 
181 
The kerosene emulsion preparation can also be applied for the 
Lecaniodiaspis, of which only a few specimens were found on the twig 
which you sent. 
Yours truly, 
F. H. Chittenden. 
Acting Chief, Bureau of Entomology, 
Washington, D. C. 
Another possible enemy to the Cast ill oa that the alert planters were 
seeking information about, was a wood borer which attacked the tree 
where the self-pruning branches broke off, and occasionally where the 
STERN OF “NAT, JR.” 
bark was cut or wounded. The larva: of the insect are large grubs, that 
after penetrating the outer bark burrow upwards inside of the cambium, 
and then straight through the wood, completely honeycombing it so 
that the trees break short off when very little wind comes. This does 
not always kill the tree, but it sets it back appreciably. These borers 
appear to be most active during the months of June and July. The 
planters, for a remedy, were using a mixture of tar, kerosene oil, black 
oil and sulphur. This killed the grub if it touched it, but it was very 
difficult to reach it because of the length of the burrow. A suggestion 
for keeping the borers out was to have a gang of men constantly going 
