INJURING THE HEAD. 237 



leaf-bracts at the base of the plant. The eggs are 

 very small, oval, smooth, and yellowish-green. 

 Each female is capable of depositing 200 to 300 

 eggs. In about ten days the larvse hatch and begin 

 feeding on the leaves. They are legless little grubs 

 of the form shown at c. They continue feeding and 

 growing (b, b, b) for seven or eight weeks, increasing 

 much in size and moulting three times during the 

 period. The larvae, like the beetles, are mostly noc- 

 turnal in their habits, and ordinarily remain con- 

 cealed during the day. The full grown larvse form 

 pale yellow cocoons, consisting of a coarse network 

 of silk (/, g) in the soil, just beneath the surface. 

 They pupate (li) within these cocoons, and a month 

 later emerge as beetles. There is apparently but one 

 brood each season, although it is possible that there 

 may sometimes be two. During the early summer 

 months (May and June) it is mostly in its immature 

 stages. It ordinarily hibernates as an adult, but 

 may also occasionally pass the winter in the other 

 stages of its existence. 



Remedies. — The only remedy yet suggested is 

 that of plowing under infested fields during May or 

 June, thus destroying the immature stages. 



INJURING THE HEAD. 



The Clover Seed-midge. 



Ceaidomyia leguminicola. 

 The Clover Seed-midge is a small, orange-colored 

 maggot that develops in the clover heads at the 



