288 PESTS OF ORCHARD AND SMALL FRUITS 
An application of arsenate of lead or Paris green is the best control 
measure until the fruit is well colored. 
The Strawberry Sawfly (Empria ( Harpiphorus) maculata Nort.) 
About the time that strawberries begin blooming, the leaves are 
eaten by sluglike worms, half an inch long, yellowish in color, with a 
pale stripe down the back. When not feeding, the slugs often rest on 
Fic. 424.— The Strawberry Sawfly. Enlarged and natural size. Original. 
the under surface of the leaf, coiled in a sort of spiral. The adults are 
small, four-winged insects. Winter is passed in the ground. There 
is one brood each vear. 
The best means of control is an early application of arsenical poisons. 
If ripe strawberries are already on the vines when injury is noted, 
hellebore may be used. 
The Pear-slug (Caliroa (Eriocampoides) cerast Linn.) 
Small, dark green, slimy slugs eat the surface of the leaves of pear, 
cherry, and plum, gnawing off the epidermis and leaving the veins and 
lower surface. The tissues where they have been at work turn brown, 
