cabbaCtE moth ; snowy fly. 



33 



in the main saved. In dry seasons like this the plants grow 

 slowly, and the mischief done is more apparent ; whilst in 

 damp seasons the rapid increase of foliage makes the damage 

 less noticeable."* 



The same means are applicable for prevention that are 

 recommended for destroying the Heart and Dart Moth, A. 

 exclamationis, and most of the remedies against the Cabbage 

 Moth, M. hrassiccE, are also ai^plicable to this one, but not 

 all, as the Cabbage Moth caterpillar feeds by day as well as 

 by night. The caterpillar of the Yellow Underwing feeds on 

 Docks and on Bittersweet ; consequently clearing these 

 common weeds would be of much service. 



Snowy Fly (Cabbage Powdered-wing). 



Aleijrodes proletdUt , Liun. ; A. cheledonii, Latr. 



^^- 



Aleijrodes proletella : Fly and pupa, much magnified ; Flies on leaf, twice nat. size. 



This is a small four-winged Fly, very like a small 

 powdery White Moth in its appearance, but is in fact nearly 

 allied to the Scale Insects and to the Aphides. It may be 

 found on different kinds of Cabbage, more or less, all the 

 year round, and towards autumn in such enormous quantities 

 that, if the plants are stirred, the soft white flies will rise 

 and float in the air, and settle down like miniature snow- 

 flakes, whence its name of the Snowy Fly. They rest for the 

 most part beneath the leaves, and draw away the sap 

 with their suckers ; and at times do a good deal of harm. 

 The attacked leaves may generally be known by their patchy 

 brown or yellow state, but sometimes are entirely dis- 

 coloured. 



* The above observation is well worth attention, as coming from such a 

 first-rate authority as Mr. Glenny. For details of this method of treatment as 

 practised in the Cabbage-growing district near Hounslow, for methods of 

 prevention and remedy suitable for other kinds of " Surface-caterpillars," and 

 for explanation of this term, see paper on " Turnip Moth." 



