120 INJURIOUS INSECTS OF 1909 AND IQIO. 
log was provided with the natural dampness of the earth to a large 
degree, and at the same time the sand gave admission to enough 
air, so that everything was kept in good condition through the win- 
ter. This apparatus was kept in the outer cold portion of the in- 
sectary. 
It will be seen that this cage was intended to work on the same 
principle as the parasite-cages already so generally in use—that 
is, the lamp-chimneys take the place of the glass tubes in the para- 
site-cage—and it was taken for granted that the beetles, when 
they emerged, would go to the light in the lamp-chimneys. 
Fig. 71. The “borer cage” ready to be covered with sand. Franklin. 
The log passed the winter in good condition, and the adult 
beetles emerged regularly from July tst to July 8th, and were all 
in splendid condition, twenty-six in all being taken from the chim- 
neys. The log was afterward chopped open, and no dead larvae 
or pupae were found in the experiment. The adults which were 
taken from the experiment were all pinned, and many larvae of 
this species were bottled, and these specimens may be found by 
looking up the accession references of experiment 410, 1908. 
A general view drawing of this apparatus was made as it lay in 
working condition in the sand, and also a drawing of one of the 
lamp-chimneys, showing the connection between the lamp-chimney 
