PSEUDO-GALLS. 



399 



Pseudo-^aUs of the Havothoryi, drawn from specimens. 



above the root; and on the upper branches of the 

 birch, where a crowded cluster of twigs sometimes 

 grows, bearing no distant resemblance to a rook's 

 nest in miniature. 



One of the prettiest of those pseudo-galls with 

 which we are acquainted, is produced on the Scotch 

 fir {Pinus sijlvestris), by the aphis pini, which is one 

 of the largest species of our indigenous aphides. The 

 production we allude to may he found, during the 



Pseudo-gall produced hy A/)his Pini on 

 a specimen. 



the Scotch fir, drawn from 



