SWEET-POTATO. 



219 



The large green worm of the sweet-potato-moth 

 (Sphinx cingulatd) very much resembles the tomato- 



Fig. 61. TWO-STRIPED TORTOISE-BEETLE ( Cassida bivittato). 

 1: Larva, natural size .- 2, Larva ; 3, Pupa ; 4, Beetle, all magnified. 



worm, but is not in sufficient force to do much injury. 

 The moth is especially distinguished from Sphinx Carolina 



Fig. 62. GOLDEN TORTOISE-BEETLE ( Cassida auricMlcea). 

 a, Larva, natural size ; b, enlarged, with dung removed ; c, Pupa ; d, Beetle. 



and Sphinx quinquemaculata by its pink-striped under- 

 wings. The larvae of the tortoise-beetles, although some- 



Fig. 63. MOTTLED TORTOISE-BEETLE ( Cassidci guttata). 

 a, Larva ; b, Pupa. 



times abundant, are not sufficiently so to diminish the 

 crop of the truck-farmer. They have, like those of 



