138 JULY. 



the ground, since moths seldom fly to the high 

 branches ; those whose roots form an angle filled with 

 loose dry earth, especially when covered with grass, 

 and lastly those which have a loose thick moss upon 

 them. Nothing, however, can be more uncertain than 

 any rules in this matter. You will perhaps see ten 

 elm trees to your eye exactly alike : at nine you may 

 find nothing, at the tenth possibly twenty or thirty 

 pupae. I remember on one occasion trying a number 

 of ash trees without the slightest success, and was about 

 to give up the searching as hopeless when I resolved to 

 try one more. At that one I found forty-six pupae 

 of Ennomos illunaria, and three of Pcecilocampa 

 Populi." 



There is one locality to which I would direct the 

 tyro's especial attention. On heaths, downs, in old 

 gravel and sand pits, hidden among brushwood, and 

 scattered about on the sea shore, we may often see 

 large stones or boulders, and old trunks of felled trees, 

 covered with moss, under which the pupa-hunter will 

 often reap an abundant harvest. 



