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. 



S6 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 (H y p h a n t r i a c u n e a). 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 pyrin a). 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 Buflalo. Beetles appear in June. 



Treatment : cut and burn badly infested trees. 



GARDEN INSECTS 



41 Colorado potato beetle (Doryphora lo-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. 



