182 
burrow is thus differently coloured, the general course of them 
ultimately becomes evident; but unless this is done, it is impossible to 
delimit each burrow without confusion, and um such delimitation is very 
important for studying the facts of the case 
THe COFFEE Borer. 
The stem sent measures about 2 ft. 6 in. from the collar upwards. 
The main roots are attached. It contains four burrows, made by not 
less than four larve. 
About 2 feet from the collar is a large eroded patch about 8 inches 
long, extending nearly round the stem at its lower part. From this 
patch the bark is removed, and the sapwood is exposed and scored with 
shallow grooves due to the larval burrows. 
row 1.—At its upper part is a hole leading into the heart-wood, 
this communicates with a burrow running down the stem for 15 inches, 
nd communicating with the outside part of the way down by a hole 
with callused margins, at the bottom it turns upwards and finishes in a 
pupal chamber communicating with the est by a circular flight-hole 
through the bark. This burrow is old, as seen from its discoloured 
walls, emptiness, and the seperni of the flight-hole. It has bee 
made and quitted some time before the stem was cut. At the point 
where it enters the heart-wood froi the surface there is some callus, 
and it appears to me that the eia mischief caused „by this partieular 
== had partly healed, and that most of the erosion in the patch from 
which the burrow starts was tanse by the larva which had formed 
burrow 2. 
Burrow 2 begins at the lower part of the croded patch and runs 
upwards for 5 inches in the heart-wood to finish in a pupal chamber 
without exit. This burrow is a season, at least, later in date than 
burrow 1, and its course is largely determined by the presence of the 
latter. Its walls are not discoloured. As there is ro exit hole to the 
-burrow the terminal chamber must have contained the larva or pupa at 
-the time S stem was split open. 
Burrow 3 begins at a second E eroded Bits Si patch just MAS 
. the A. common to it tnd the burrow ; it is about 1 foo 
length, runs deeply down into the es aud re-ascends to open st js 
upper extremity by a flight-hole. "Thisis an old burrow, about the same 
age as ape 
Burrow 4 begins at the large pateh common to it and 3, and also 
runs doin towards the roots; it is short, not above 4 inches in length, 
and turns back to open at a zirean? flizht-hole some 4 inches abuve "the 
ground. ‘The hole is fresh. The remains of the pupal packing are in 
_the burrow, which is later in date than 1 or 3, and probably coeval with 2. 
Root ynawing. 
Besides these four burrows, one of the roots has been extensively 
guawed in patches, I am unable to trace any communication between 
there patches, which appear to be isolated i in places from each other, and 
- mportance in causing the state of health. favourable to » borer attack, aud 
~ tthe sume time be easily overlooked. 
