THE MELON FLY. 29 
out of 692 young protected watermelons were actually free from in- 
festation. 
Certain Japanese growers ward off attack by burying the young 
fruits in the soil or by surrounding them with straw or trash until 
they are sufficiently old to withstand fatal attack. In certain light 
soils cantaloupes are kept buried in the soil until they are ripe and 
they appear upon the market almost white in color. The most suc- 
cessful of protective coverings are those shown in figure 24. In this 
case the Momordica vines are grown over bushes, hence the young 
fruits can be found easily and inclosed in long cases made from 
newspapers and resembling envelopes cut across at both ends. These 
cases are left open at the lower end, but are never entered by the 
adult flies. 
MEASURES TAKEN TO KEEP THE FRUIT FLIES OF HAWAII FROM 
GAINING A FOOTHOLD IN CONTINENTAL UNITED STATES. 
The Federal Horticultural Board, by means of its Quarantine 
No. 13, entitled "Mediterranean Fruit Fly and Melon Fly," issued 
March 23, 1914, is doing all that man can do to prevent the two 
fruit-fly pests of Hawaii from becoming introduced into main- 
land United States. The regulations of the quarantine practically 
have put a stop to the movement of fruits and vegetables from 
Hawaii. Certain fruits and vegetables, however, such as bananas 
of the noncooking type, pineapples, taro, and coconuts, and others, 
when it can be shown to the satisfaction of the Department of Agri- 
culture that in the form in which they are to be shipped they are 
not and can not be a means of conveying either the Mediterranean 
fruit fly or the melon fly, may be moved or allowed to move from 
Hawaii into or through any other State, Territory, or District of 
the United States when they have been inspected by the United 
States Department of Agriculture, certified to be free from infesta- 
tation, and marked in compliance with the regulations. Pineapples, 
taro, and coconuts do not support the fruit flies of Hawaii, neither 
do bananas when shipped according to trade requirements. In prac- 
tice the quarantine eliminates all shipments of fruit except the four 
just mentioned, and of these pineapples and bananas only are regu- 
larly shipped. 
The enforcement of the quarantine is divided between the repre- 
sentative of the board in Hawaii and those at the ports of entry to 
the mainland, notably San Francisco, San Pedro, and Seattle. In 
Hawaii it is the duty of the inspector to see that the fruit is grown 
under conditions reasonably sanitary from a fruit-fly standpoint, that 
each package or bundle offered for shipment is inspected and bears a 
certificate to that effect, and that transporting companies do not re- 
