T48 | NEW YORK STATE MUSEUM 
young had not begun to appear May 29. The young may be 
expected in the latitude of Yonkers about the middle of May 
and later; and thorough spraying at intervals of about a week, 
as long as the young appear, with kerosene emulsion, diluted 
with nine parts of water, will probably be found very effective 
in checking this pest. Aim to cover every part of the infested 
tree with the insecticide. 
The small Lecanium nigrofasciatum Perg. has 
proved a rather serious enemy to soft maples in Albany. This 
scale insect has been so abundant on some small trees as nearly 
Fig.19 Pseudococeus aceris: aadultfemale; bantenna of same; cadult male; dyoung 
larva; cantenna of same—a, c, d greatly enlarged; b,e still more enlarged. (After Howard, Insect 
life. 1894. % :237) 
to cover the under surface of the limbs, and so mrch honeydew 
was exuded that the walks beneath were kept moist. The 
severe drain on the trees prevented much growth and resulted 
‘in killing a number of the smaller limbs. Badly infested twigs 
have a marked sour, semiputrid odor due in all probability to the 
decomposition of the honeydew. Young began to appear in 
Albany about June 14, and by July 15 they were about .5 mm 
long and were thickly set on the smaller twigs (pl. 4, fig. 2). 
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