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FOREST AND SHADE-TREE INSECTS 
GENERAL FEEDERS 
OYSTER-SHELL SCALE (Lepidosaphes ulmi L.) 
Nebraska M. H. Swenk (March 15). "The leafless condition of the trees has 
caused inquiries regarding the scale-insect infestations which 
are now exposed and comparatively conspicuous. Such inquiries 
are related chiefly to the oyster-shell scale." 
TUSSOCK MOTH ( Hemerocampa leucostigma S. & A.) 
Illinois C. C. Compton (March, 1522). "From the number of egg masses it 
is evident that the tussock moth will be numerous this year in 
Humboldt Park and also Oak Park, Chicago. The temperature has been 
above the normal, and but few egg masses show parasitism." 
BORERS 
Nebraska M. H. Swenk (March 15). "Reports indicate that the various shade- 
tree borers are resuming activity. Reports of this sort have been 
received since March 9." 
MAPLE 
, MAPLE S ESI AN (Sesia acerni Clem.) 
Ohio H. A. Gossard (March IS). "Maple sesian was received from Hicksville 
in Defiance County." 
FLAT-HEADED APPLE-TREE BORER ( C.irvscbothris femorata Oliv.) 
Illinois M. D. Leonard (November 26, 1921). "I have just received specimens 
of the flat-headed apple-tree borer from Danville. The nurseryman 
who sent them in stated that they were very injurious to newly 
planted hard and Norway maples." 
ELM 
WOOLLY ELM APHIS (E rioscma americana Riley) 
Ohio H. A. Gossard (March 18) . "This insect was received about a half 
dozen times and about twice as many inquiries evidently referring 
to this pest came in during the winter." 
AMERICAN ELM SCALE (Chionasr.is americana Johns.) 
Nebraska M. H. Swenk (March 15). "The leafless condition of the trees has 
caused inquiries regarding the scale-insect infestations which 
are now exposed and comparatively conspicuous." 
