288 



CORYLACE.E. 



of spangles, we, several years ago, ascertained that they 

 were the nidi of a cynips, having reared a great many 

 of the perfect insects from the spangles collected in the 

 antnmn, and kept in a cool and rather moist atmosphere 

 during the winter. About the fall of the leaf, these spangles 

 begin to lose their flat mushroom-like form and red hirsute 

 appearance, and become by degrees raised or bossed to- 

 wards the middle, in consequence of the growth of the 

 enclosed grub, which now becomes visible when the span- 

 gle is cut open. The perfect insect makes its appearance 

 in April and May. 



The species of lichens, fungi, and mosses which grow 

 upon the Oak are also very numerous, but, as our descrip- 

 tion has already exceeded its due limits, we must refer 

 our readers to cryptogamic authors and to the list of these 

 plants contained in the " Arboretum Britannicum."" 



