Plate VIII. 
Fics. 23, 24. Burrows of Chrysobothris blanchardi in 
larch limb. The larval mine during the first year is likely 
to be linear and is usually not very tortuous while that made 
during the second year is very tortuous. The adult in emerg- 
ing from the pupal chamber uses the entrance burrow made 
by the larva. The two burrows shown in Fig. 24 are quite 
typical. Fig. 23 reduced to about one-half natural size. 
Fig. 24 reduced to about two-fifths natural size. 
Fig. 25. Burrow of C. blanchardi in larch from which 
the frass has not been removed. Note that this material 
forms alternate bands of ight and dark. This is produced 
by the habit of the larva in excavating from the bark and 
from the sapwood alternately. This material is arranged to 
form curved strize by the abdomen of the flat-headed larva, 
which is habitually bent to form a loop and pressed against 
the frass in order that the borer may obtain leverage in rasp- 
ing off the fibres. Reduced to about two-fifths natural size. 
Fic. 26. Burrow of Chrysobothris seax-signata in small 
larch sapling. The burrow here is relatively shallower and 
wider than those made by the foregoing buprestids. That 
made during the second year is especially wide. The larval 
entrance to the pupal chamber is used by the adult in emerg- 
ing. Reduced to about five-ninths natural size. 
