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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 

 a]>plied 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 mnch 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 pup* 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 



