REPORT OF THE ENTOMOLOGIST. 
INTRODUCTION. 
Sir: I have the honor to present herewith my annual report for the 
year 1887. Much is omitted therefrom, both on account of restric- 
tions as to the size of the volume and the increased number of the 
divisions of the Department which must be represented in the general 
report, and on account of the policy which I am more and more 
adopting, with your sanction, of confining the publication of articles 
of less general interest, or rather those upon insects affecting the 
more restricted crops or industries, to the special bulletins of the 
Division. The chief articles in this report, therefore, treat of two 
insects which are found throughout the country and which affect 
seriously several of our most important crops. ' 
The entomological event of the year has been the great damage 
done by the Chinch Bug in most of our grain-growing States of the 
West. Mr. Dodge, the Statistician, reports that at the very lowest 
estimate the loss for the year has amounted to $60,000,000 in nine 
States. Owing to the fact that Bulletin 5 of the U. S. Entomolog- 
ical Commission treated of the species with some detail, and to the 
further fact that I have dealt with it fully in my earlier writings, 
especially while State Entomologist of Missouri, no complete account 
of it has been published by the Department. There is so much that 
is new to investigate and work at that I find it difficult to dwell at 
length on insects to which I have given so much time in the past. 
The bulletin just mentioned is, however, out of print, and the de- 
mand for information on the subject is so constant that I have had 
Mr. Howard prepare as the first article of this report a complete ac- 
count of the species. The article not only digests all that has been 
published, but includes a number of unpublished facts, mostly de- 
rived from the observations of the field agents of the division. The 
only new remedy of importance brought into use since the publica- 
tion of the Missouri reports, viz, the kerosene emulsion, is here 
treated in some detail. 
Much the same reasons may be given for the publication of the 
second article of the report, which has also been prepared by Mr, 
Howard. The Codling Moth is the most injurious of our orchard 
pests, and a complete summary of its habits and remedies is needed. 
Recent experiments have shown the value of arsenical spraying, if 
done eee Sie and at the right time, and more space is therefore 
devoted to the consideration of this remedy than to the others. 
An account of the investigation of the Hop Aphis, mentioned in 
the Introduction to my last report, is deferred for a few months. 
The investigations made have been thorough and satisfactory, and 
justify, in a striking manner, the position taken a year ago. The 
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