THE ATHENIAN POPLAR. 193 



Sphinx, Smeritithus populi, and we have also found upon 

 it those of Cerura vinula, Notodonta ziczac, Clostera reclusa, 

 Leiocampa dict<ea, and Calyptra libatrix. 



The specific characters, according to Willdenow, are, 

 branches round and smooth, leaf-stalks compressed, the 

 disk of the leaves roundish-ovate, the end acutely pointed, 

 and with a shallow sinus at the base, serrated, with equal 

 adpressed teeth, smooth, except being slightly ciliated on 

 the edge. 



At Twizell, twenty years planted, it is thirty-five feet 

 high, and two feet six inches in circumference at two feet 

 from the ground. Our figure is a portrait of this tree. 

 At Howick Hall, the seat of the Earl Grey, there are 

 specimens of larger dimensions. 



