Description of Plate VI. 
N . - 
Transverse section through overgrown beehoJe showing formation of callus lobes 
in the mouth of the sap-wood chamber, and the appearance of the annual rings, 
antecedent and postcedent to the attack. 
The upper and middle sections are of beeholes, the lower section of a wood¬ 
pecker’s hole. 
(Natural size, vide scales in inches and centimeters). 
