








on observers are — in in 



165 
— I have examined a consignment of eight or nine long canes sent - 
from Trinidad tc Kew by Messrs. C. Tennant, Sons, & Co. (22). They 
or nearly all the joints, e uL at the lower part of the cane. Every 
cane mend as well i or more joints the burrows of a larger 
insect, of which six or in some canes. These were of 
older E etidi and full of. Tengoassa growth, and as the insects which - 
had caused them were not present, it is impossible to state eve 
the species à 
In one or more instances the remains of a cocoon show with ical — 
certainty that the insect was a weevil, probably Sphenophorus acchari 
(25); from pe evidence of another cocoon, Chilo soccharalis the 
* borer-moth," was also present, and this species probably caused most 
of the mage. Ta one cane the three lower, and in another the two 
lower joints were hollow and rotten. This looked like the work of 
a large Lamellicorn beetle-larva, or a Rhynchophorus weevil. ved 
ould be possible to eut tein some o of ‘these canes 1-2 foot oce 
sich should show no ses but the burrows of X. perforans. 
e vertheless, the fact that half a dozen caues have 
; countin: p on of t 
by X. perforans akin i in on with other insects, sda by the 
latter when it is not 
Those who iih studied the attacks in ‘Trinidad, namely, Mr. J. H 
Hart and the members of the Trinidad Committee, are disinclined to- 
attribute the mischief to previous insect aladar as is done by Mr. H. 
H. Smith, Mr.. G. W. Smith, and others. Professor Toona 
accepts X. perforans as the true destroyer, but as he does not discuss 
the question of its being a successor of other somnies it is impossible to’ 
say from his report (18) if he has considered i 
_ Trinidad Committee (26) does indeed | 
“ that the beetle is | the primary cause cause of the 
] to th i 
© 
a 
se 
t 

- do San refer resent very important remarks 
"In this and in peret ‘sections t 
verted commas; the 

le to attacks of blight oceabined either b by the attacks | 
« With this view a most minute: examination was made into the ate 
of the Dodds’ e. experiments with seedling canes, as as expected 
4 Hee S rag vigor would be found among the seedling varieties ; m 
