Oo” 
and then forwarded to parties in the extreme northwestern part of 
North Dakota. Twenty-five poplar trees were killed in one locality 
by these borers, and I have no doubt, although I can not obtain 
absolutely accurate information, that some of the shipment was 
distributed within our own State boundary. The nurseryman im- 
porting this stock, of course, was in no way to blame in helping on 
the westward progress of this unwelcome immigrant, since the cer- 
tificate of the inspector was supposed to be an absolute guaranty 
that the stock was all right. In complaining of this to the New York 
commissioner of agriculture I was met with the statement that, while 
it seems impossible to eradicate this beetle in New York State, 
measures can and will be taken to prevent infested stock from being 
sent to other States. Our nurseries in Minnesota have been carefully 
inspected and found to be practically free from insect or fungous 
pests. It should be said in this connection, however, that inspection 
is not compulsory for all nurseries, and not more than two-thirds 
desire it, namely, those who ship to other States, and others who do 
not export, yet value the entomologist’s certificate as an advertise- 
ment of clean stock. Occasional occurrences of woolly aphis in 
limited. numbers are the only especially undesirable features dis- 
covered in connection with nursery stock. 
Our shade trees, the soft maple and the elm, have been alarmingly — 
affected with the cottony maple scale (Pulvinaria innumerabilis 
Rathv.) in many of our towns and cities, as well as in those of some 
of the neighboring States. It has been present in such large numbers 
as to check the growth of maple trees and weaken their vitality. 
Our attention has been called particularly to cecidomyiid gall- 
makers on the box elder, the soft maple, and a locust, the variety of 
which could not be given me. Specialists in this group at Washing- 
ton, D. C., identified specimens mailed them as evidently C. negundis 
Gill, C. aceris Shimer, and C. robinie Hald., respectively. From 
C’. aceris we reared two parasites, Tetrastichus sp. and Meraporus sp.;3 
from C. robiniw we reared a pteromaline, which Doctor Ashmead 
pronounces an apparently undescribed genus. 
A species of Lecanium has occurred for several years on the coni- 
fers in the experiment station forest, and this year has been particu- 
larly troublesome on Scotch and jack pines. It evidently can 
be: controlled by spraying with kero-water or kerosene emulsion. 
After one or two insecticide applications we found a coccinellid 
(ilyperaspis sp.) in such large numbers, both larvae and imagoes, 
that we deemed it wise to leave the question of the “ survival of the 
fittest ” to it and the scale upon which it fed. 
