68 



very rare, he 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, Galopfenus 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, j)ublished four reports' as a])pendices 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 api)ointment 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 Acridiidte 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 Aphidid;e. His fourth report included a consider- 

 ation of one family of the Orthoptera, namely, the Acridiid.ne, and the 

 fifth a ])aper on the larvne 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 remaius, therefore, unfinished. In the course of the six 

 reports a very large number of insects are treated from the economic 



