206 



TRUCK-FARMING AT THE SOUTH. 



beetles, by its own excrement, as shown in fig. 52. The 

 perfect insect has a general resemblance to the Striped 

 Cucumber-beetle. 



The White Grub is a general feeder, and destroys the 

 roots of many different plants. The larva is shown at 

 fig. 53, and the perfect beetle, the well-known June-bug, 

 in fig. 54. 



The principal insect enemies of the sweet-potato are 

 the Tortoise-beetles, of which there are several, some of 



Fig. 53. 



WHITE QBUB. 



Fig. 54. 



JUNE-BUG. 



Fig. 55. 



CLUBBED TOR- 

 TOISE-BEETLE. 



them of singular beauty. One of them, the Clubbed 

 Tortoise-beetle (Deloyala davata, fig. 55), forms an ex- 

 ception, and selects the common or Irish potato as its 

 food plant, feeding upon it in its perfect state, the larva 

 of this species being unknown. 



The Blister-beetles feed upon the foliage in the perfect 

 state only. They are sometimes quite abundant, particu- 

 larly upon the second crop. Some of the farmers near 

 Savannah were compelled to use Paris green last season, 

 to stay the ravages of Lytta marginata. 



