34 



EXPT.AXA'riOX OF PLATES. 



I'LATl-: 1. 



l''i,L;uiX' I. — \'ie\v of the inside of a su^rir cane leaf-shealli. the 

 darkened streaks sliowin;^- where 1)U(1 worms lia\e eaten away the 

 suhstance l)etween til)ers. Some cocoons and cater|)inars also 

 shown. 



I''i,^nre 2. — A ])ortion of cane stick sliowinq- the l)uds destroyed ; 

 and the darkened areas tlie cliaracteristic manner in which the 

 l)ud worm eats off tlie surface of the rind 



h'ig'ure ^. — Cocoon of Itnd worm covered with fibers from cane 

 k^af." 



I'igure 4. — C'ocoon of l)nd worm covered with frass. em])ty 

 ])n])a case ])rolrn(h'nq-. 



