66 MANUAL OF VEGETABLE-GARDEN INSECTS 



sciili)tured with rows of hexajijonal pits. One female has been 

 known to deposit 795 egg's, but this is un(h)ubtedly far above 

 the average. The femak^ eontinues to lay eggs for nearly a 



month. The eggs hateh in about 

 eighteen days in the spring and in 

 the summer in five to eight days. 

 The larvae feed on the roots, the stem 

 underground, and are particularly 

 fond of the bacterial nodules found 

 on the roots of leguminous plants. 

 The full-grown larva is ^ inch in 

 length, white in color, with the head, 

 cervical and anal shields dark. The 

 larva becomes mature in three weeks 

 in summer to six or more in the fall, 

 transforms to a white delicate pupa 

 in a small earthen cell in the ground 

 and in about a week the transforma- 

 tion to the adult takes place. In the North there is only one 

 generation a year. In Mrginia there are two, and farther 

 south probably three. 



Control. 



The beetles may be killed by spraying the vines with arse- 

 nate of lead (paste), 4 pounds in 100 gallons of water, taking 

 care to apply the spray to the underside of the leaves. The 

 application should be made at the first appearance of the 

 beetles before they have had time seriously to injure the plants 

 and in order to destroy the females before they have laid their 

 eggs. In the home garden, the beetles may be collected by hand 

 but spraying is the more convenient and practical treatment. 



Fig. 47. — The beai 

 beetle (X 3i). 



References 



Chittenden, U. S. Div. Ent. Bull. 9, pp. 64-71. 1897. 

 McConnell, Jour. Ee. Ent., 8, pp. 2G1-266. 1915. 



