582 NEW YORK STATE MUSEUM 
cause considerable injury. Beetles appear from early May till latter part 
of June. 
Treatment: cut and burn badly infested trees. Protect valuable trees 
with carbolic soap wash during May and June. 
36 Elm snout beetle (Magdalis barbita). Thick, fleshy, 
legless grubs working in inner bark of elm. Follows attack by the elm 
borer and occasionally is very abundant. 
Treatment: burn badly infested trees and keep others vigorous. 
37 Fall web worm (Hyphantria cunea). Web tents in 
July and August inclosing leaves on the tips of branches, the eaten 
foliage turning brown. Attacks many trees. 
Treatment: destroy webs and their inhabitants or spray foliage of 
affected limbs with poison. 
38 Bag worm (Thyridopteryx ephemeraeformis). 
Defoliated evergreens and other trees are found infested with curious 
cocoons or bags containing caterpillars in late summer and fall. Occur 
in vicinity of New York city. 
Treatment: collect and destroy bag worms or spray with poison. 
39 Leopard moth (Zeuzera pyrina). Whitish, black-spotted 
caterpillar making large burrows in various trees. A bad pest about 
New York city. 
Treatment: dig out young borers. Kill others with carbon bisulfid. 
Burn badly infested trees. 
40 Bronze birch borer (Agrilus anxius). If injured bark 
is examined, a slender flat-headed grub will be found running burrows in 
all directions in the inner portions. White and other birches are attacked. 
Very injurious at present in Buffalo. Beetles appear in June. 
Treatment: cut and burn badly infested trees. 
GARDEN INSECTS 
41 Colorado potato beetle (Doryphora ro-lineata). 
Stout.yellowish beetles with black striped wing covers appear in early 
spring, feed, and deposit yellowish eggs in clusters on under surface of 
leaves. The reddish, black-marked grubs also devour the foliage. 
Treatment: handpicking; spray vines with poison. 
42 Squash vine borer (Melittia satyriniformis). 
Wilting of one or more runners is caused by a whitish caterpillar boring 
in the stem near the root. 
