PSEUDO-GALLS. 



399 



Pscudo-'^dUs of the Hawthorn, 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 (Pimis sijlvestris), by the aphis pini, which is one 

 of the largest species of our indigenous aphides. The 

 production we allude to may be found, during the 



Pseudo-gall produced by Aphis Pini on the Scotch fir 

 a specimen. 



