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distribution and studying- its habits. In another paper I have given 
in some detail a record of my observations in this matter, and I need 
not do more than mention the subject here. Incidentally I found that 
the most abundant scale in the orchards generally was the Chionaspis 
furfurus, which attacked pear trees of all varieties and more rarely 
apples. In one case I found it completely incrusting currant twigs 
and branches, giving by its great numbers such peculiar appearance 
to the twigs that I failed to recognize the scale until assured of its 
identity by Mr. Howard. 
In the season of 1893 I found an orchard on the Delaware infested 
by the pear Psylla, which had been introduced apparently on young 
stock brought in considerable number from New York State. The 
insects appeared to be confined to one section of the plantation, and I 
recommended a winter treatment with whale oil soap, to be thoroughly 
applied, to all trunks and branches, and especially forced into crevices; 
rough trees to be scraped in order to destroy the hiding places, and 
consequently the insects themselves. This practice seems to have 
been remarkably successful, and I failed to find during the present 
year more than a single specimen of the insect where last fall there 
was no difficulty in finding any number. On the other hand, I found 
at quite the opposite side of the State, in the vicinity of Newark, an 
orchard very much worse infested than anything I have before seen. 
Quite early in the year — the latter part of May, I think, or early in 
June — I found any number of adults on the leaves and an abundance 
of eggs. I have not had an opportunity cf getting into this orchard 
since that time, because the proprietor is an extremely old and crusty 
individual, who keeps dogs and has the orchard defended from the 
road by a hedge of Osage orange. I got into it in the spring at a time 
when he had cut down this hedge almost to the ground, so as to make 
it possible for me to step over it, the appearance of the trees having 
attracted my attention. From another orchard in the southern central 
portion of the state I received some twigs that appeared, according to 
the owner, to be unhealthy and to have a blackish coating which was 
not due to fire blight. The specimens came while I was absent from 
the office for a day or two, but enough remained on my return to show 
that the twigs had been clustered pretty thoroughly with pupae of the 
pear Psylla. The insect therefore has probably obtained a foothold in 
different parts of our State, and is one that must be dealt with. 
The pear blister mite has been exceedingly abundant in some local- 
ities; but it is rather strange how the distribution has been localized. 
One orchard may be badly infested, another next to it may be almost 
entirely exempt. A few places that were badly troubled last year were 
very little troubled during the present season, and I have not been 
able to discover any satisfactory reason for the difference. It can 
scarcely be said that any real injury has been caused by this insect 
anywhere, and at all events not sufficient to make it worth while to 
