269 
Report on Srecimens of Sucar Cane attacked by ran from St. 
Vincent, by Mr. W. F. H. Branprorp, F.E.S., F.Z.S. 
HAVE examined the series of sugar canes forwarded to the ve 
Gardens, Kew, by Mr. James Coul of St. Vincent, West Iudies, to 
illustrate the points mentioned in his EE etter 
They are the apical portions of 11 canes cut at distancés from t 
summit varying from 3 ft. 4 ins. to 5 ft. "They show the following 
points ; — 
1. All ro been attacked by both the e oA and small bore 
2. The lar Eri include both the moth borer (Chilo ictharal) 
and the Seen bo ESI a se pied: or an allied species). is 
the latter a Ad of the former empty pupal skins and one smal 
caterpillar were found, which latter was accidentally lost before it ren 
be carefully examin 
e burrows of the weevil, when old, are ieu deren Aa cor 
from those of the Chilo, bu tswhen fresh are packed with a 
woody fibre different from the more granular t contain ad in in p 
moth tunnels. It is desirable to distino when ; possible the ipe L 
these two insects; when grubs are present this will be easy if i 
remembered that the imet grub is legless, whereas the caterpillar Ms 
egs. 
4. ‘The burrows of the larger borers are = a baie the summit of the 
cane, as described by Mr. Coull The lowest holes visible on the 
outside vary from an inch to 39 inches taloi the tip, with an average 
of nine inches. They may extend inside the cone for three or more 
E below the lowest external hole. 
- The canes are as a rule healthy looking, except for the last 12 
icti or so, which contain the tunnels of the larger borers, and are 
shrivelled and often much decayed. The shrivelling usually corresponds 
to te ni n of the burrows inside the cane, and is a fair guide to their 
extent; it appears to me to have taken = rg the life of the cane, 
and iid with the withering of the t vete orm & ready means of 
recognising borer-injury to the s summits of sth nes 
6. When allowance has been made for the fact that the caterpillars often 
leave the cane to re-enter it at another point (which is not aa to be 
the case with the weevil grubs), seven canes at least show evidence vd 

weevil and Chilo burrows occur in the same cane. If t ace as 
ve rarely attacked at the tips, these cases of double injury would be 
mark 
e. 
c far the burrows extend down the €— which depends 
chiefly o the number of separate attacks, the terminal joints are 
invariably destroyed. The apical crown of leaves is only twice present, 
in each case is pierced by borer holes; the tips eue — completely 
off, and were only held in place by the surrounding le 
8. The i injury to the extreme tips appears to be js cnusdd by the 
moth-borer 
9. The holes of the small shot-borers (Xyleborus perforans) are 
commonest in the lower part of the stem and become fewer upwards, 
always present, but if the top of the cane is very rotten only a few are 
to be found. A fav — dene: of attack is the first or second node just 
below the large burr 
U. 78693. * 
