THE SNOW-FLY. 



275 



yellowish with red eyes. The body of the adult is really red 

 and the thorax yellow, but they are covered with a white mealy 

 powder all over. They may breed all the year. Soft-soap 



Fia. 158. — A Snow-fly (Ahyrodes). 

 A, Adult Snow-fly ; b, egg ; c, wings of adult ; d, immature Snow-fly unrler scale. 



washes are the best to kill them. Nicotine has no effect on the 

 young. All outside leaves and stalks of cabbage should be 

 destroyed. 



Tomatoes and plants under glass are often attacked by 

 another species (A. vaparivrum), and may be checked by 

 fumigation. 



