SMALL BEETLES AND GRUBS ATTACKING 
in the leaves, and when the 
young or larve get to work 
a few days later, the foliage 
may be pretty well destroyed. 
The adult beetles are broadly 
oval, flattened, and their backs 
bear some resemblance to a 
shell. The Two- 
striped Sweet Potato Beetle 
tortoise 
(Cassida bivittata Say) is one 
fourth of an inch long, and 
has two black stripes on each 
of itsyellow wing covers. The 
Golden Tortoise Beetle (Copto- 
cycla bicolor Fab.) is larger 
and a bright, golden yellow. 
The Black-legged Tortoise 
Beetle (Cassida nigripes Oliv.) 
is five sixteenths of an inch 
bearing three black spots. 
FOLIAGE 155 
Fr 
G. 
159.— Work of Tortoise Beetles on 
sweet potato. Original. 
long, and has gold wing covers, each 
The larvxe of tortoise beetles are known as “ peddiers,’’ because 
they often carry a mass of excrement on two spines at the hind end, 
Fic. 160.— A Tortoise Beetle, Coptocycla 
bicolor. 
Original. 
Enlarged and _ natural 
size. 
and elevate this their 
backs. 
There is one generation a 
over 
vear. The adults hide away 
in warm, dry places. To con- 
trol, dip the plants before set- 
ting out in arsenate of lead 1 
pound to 8 or 10 gallons of 
The be 
killed by applying Paris green 
water. larve may 
or arsenate of lead to the plants 
after setting. 
