LETTER OF TRANSMITTAL. 
Carbondale, III., December 80, 1880. 
Hon. James R. Scott, President of the State Board of Agriculture: 
In compliance with the second section of the Act of the Legisla¬ 
ture of Illinois, entitled ‘‘An act in relation to the State Board of 
Agriculture,” approved May 25, 1877, I have the honor of presenting 
herewith my “Fifth Annual Report, as State Entomologist, on the 
Noxious and Beneficial Insects of the State of Illinois.” 
This will form the tenth of the series of reports by the State 
Entomologist, viz: one by Mr. Walsh, four by Dr. LeBaron, and 
five by the present incumbent. The title, therefore, will be as fol¬ 
lows: “ Tenth Report of the State Entomologist, on the Noxious and 
Beneficial Insects of the State of Illinois ,” according to the plan here¬ 
tofore adopted. 
I am glad to inform you that the demand for these reports is 
steadily on the increase, not only in our own State, but from others 
outside of our own State. The outside demand has in fact increased 
to such an extent that the few copies (200) bound separately, and 
allowed rue for distribution, are not sufficient to supply the demand 
and retain such as are necessary for exchanges, societies and 
specialists. 
I have received a number of requests for them from Europe, and 
very flattering notices of them have been returned by those receiving 
them. 
Aware of the fact that our farmers and horticulturists generally 
meet with injurious insects when they are in the larval or worm 
slmpe, and hence experience great difficulty in determining species, 
which are usually described and referred to in their perfect shape, 
I have devoted a large portion of the present report to descriptions 
of larvae. Although limiting myself to such species as are found in 
Illinois, and a few others injurious to commonly cultivated plants, 
and which will therefore probably be met with here, I have been 
able to notice but two orders—the Lepidoptera and Hymenoptera — 
for the present report. 
In the . preparation of this part of the work, I have been very 
greatly aided by Mr. Coquillet, whose contribution, although dupli¬ 
cating a small portion of the report, is inserted as furnished by 
lnm, as it was impossible, to omit these portions without leaving out 
some additional information. I am also under obligations to Miss 
Nettie Middleton and Mr. John Marten, who have prepared articles 
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