INSECTS AND OTHER ANIMAL Pests INsJuRIOoUS TO Firrtp BEANS 953 
them (Plate LXIX, 4, and fig. 86, A). This vegetative part of the plant 
may be entirely eaten away so that when the seedling comes above ground 
Fic. 86. INJURY BY HYLEMYIA CILICRURA 
A, Types of injury in bean seedlings. B, Injured bean plants known as snake- 
heads, showing the result of feeding by the seed-corn maggot 
only the cotyledons remain. This stunted form of plant is known to bean 
growers as a snakehead, or baldhead (fig. 86, B). Usually a snakehead 
shrivels up and dies, but occasionally one succeeds in producing accessory 
