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very rare, lie treated particularly of the insects affecting the grape, 
the apple, and the plum, and to this added, under the head of "Insects 
affecting garden crops generally," a chapter on the so-called " hateful 
grasshopper," or migratory locust, Caloptenus spretus. His treatment 
of the other insects is very thorough and his work in large part remains 
standard today. 
Mr. Walsh's successor, Dr. William LeBaron, a practicing physician 
of Geneva, 111., well known for his writings on injurious insects in the 
agricultural journals of the time, and an able and conscientious ento- 
mologist, published four reports as appendices to the Transactions of 
the State Horticultural Society, from 1871 to 1874. The first three 
treated of miscellaneous insects, mainly those injurious to fruit and fruit 
trees, while his fourth report and part of his third consisted of the begin- 
nings of a work entitled Outlines of Entomology, of which he completed 
only the order Coleoptera. This portion, however, was executed in the 
most scientific manner, and was fully illustrated, largely by original 
drawings by Prof. Eiley. It has since been used to some extent in the 
class room, and has undoubtedly been the means of interesting many 
students in the subject of entomology. Dr. LeBaron's treatment of 
insects from the economic standpoint was careful and practical. He 
records in his first report the first successful experiment in the trans- 
portation of parasites of an injurious species from one locality to another, 
and in his second report recommended the use of Paris green against 
the canker worm on apple trees, the legitimate outcome from which has 
been the extensive use of the same substance against the codling moth, 
which may safely be called one of the great discoveries in economic 
entomology of late years. 
Dr. LeBaron died in harness, I believe, and was succeeded in office by 
the Rev. Cyrus Thomas, of Carbondale, who published a series of six 
reports, extending over the years 1875 to 1880. Mr. Thomas at the time 
of his appointment was a well-known entomologist, who had written 
extensively for the Prairie Farmer and other agricultural newspapers 
on the subject of economic entomology, and who had published an elab- 
orate monograph of the Acridiidre of the United States as one of the 
special volumes of the Hayden survey of the Territories. He started 
with his first report, a manual of economic entomology for the State of 
Illinois, including in this report the portion relating to the Coleoptera. 
In his second report his assistant, Mr. G. H. French, treated of the 
Lepidoptera, and in his third report Mr. Thomas treated theHemiptera, 
monographing the Aphididre. His fourth report included a consider- 
ation of one family of the Orthoptera, namely, the Acridiidse, and the 
fifth a paper on the larvaB of Lepidoptera, by his assistant, Mr. D. W. 
Coquillett, while in his sixth he was obliged, from the force of circum- 
stances, to abandon the scheme. The manual of economic entomology 
of Illinois remains, therefore, unfinished. In the course of the six 
reports a very large number of insects are treated from the economic 
