THE CANADIAN ENTOMOLOGIST 177 



had been feeding for several weeks and which were now fermenting 

 and dying, were recovered six eggs which died when exposed to the 

 atmosphere. 



Thirty-three random beetles were taken and confined singly 

 in long glass vials plugged with cotton (vial 4 inches long by ^-inch 

 diameter); they were not fed, and spent most of their energy in 

 trying to escape; they died as follows: After one day, three males; 

 two days, 6 males, 5 females; after three days, 8 males, 5 females; 

 on the fourth day, 4 males, 2 females. They thus seemed to require 

 a constant supply of food. 



Ten random pairs were placed on a cane plant (leafless) under 

 a high Tower breeding cage; all were dead after three weeks, 

 as was also the cane plant. 



On. October 1, 1912, a single young larva was placed within a 

 wound made in the top side of a strip of cane which had rooted in 

 a box of earth; this larva hatched from eggs deposited between 

 September 19-30, 1912. It developed; on November 27, or after 

 nearly two months, the cane was cut off just below the spot where 

 the young larva had entered, exposing a cylindrical channel which 

 was five inches long, traversing four nodes. The grub was found 

 at the end of this channel, nearly full grown. On December 20 

 the plant was examined again; the grub had gone four inches 

 farther down and then returned, constructing a cocoon at about 

 the place where it had been found in November. The cocoon 

 contained a pupa which was accidentally injured. The plant was 

 dead. The period of development in this case was about three 

 months, probably longer than natural because of the unhealthy 

 plant in which the grub developed. When placed into the plant, 

 the young grub was about a week old or less. 



Eleven glass jars were taken on August 12 and partly filled 

 with about an inch of moist, sifted soil upon which was placed a 

 node of matured cane; into each of these was introduced a male 

 and female beetle of about equal size. The jars were then covered 

 with cheese cloth. Four similar jars received single females taken 

 at random and a fifth jar, five females. From time to time, the 

 pieces of cane were removed from these jars, examined and a fresh 

 piece added. The removal became necessary in most cases because 

 of moulds developing on the cane. The beetles fed from the pith 



