THE GREY-STF.IZAK MOTH. 163 



of the family Plutellidse, namely, the Grfy 

 Streak {Pluiella porrectella). 



The upper wings of this Moth are greyish 

 white, sometimes with a creamy tinge, and they 

 are patched and streaked with dark brown. The 

 lower wings are pale brown. This insect is 

 sometimes called the Eocket Moth, because the 

 larva chiefly feeds upon the rocket plant, drawing 



Plutellji. porrectella. 



the leaves together by silken threads, and conceal- 

 ing itself in the middle of them. 



This is one of the double- brooded ]\Ioths, one 

 set appearing in the spring and the other in the 

 autumn. 



Passing by a considerable number of families, 

 we come to a very plentiful and very mischievous 

 little insect, the Confluent-barred Moth {Gra- 

 cillaria syringella), which is here shown together 

 with its habitation. 



The colour of this Moth is rather pretty, the 

 upper wings being ochreous yellow, mottled with 



M 2 



