424 ENTOMOLOGY 



directed the preparation by Needham and his associates of three notable 

 volumes on aquatic insects. 



The Cornell University Agricultural Experiment Station, established 

 in 1879, has issued many valuable publications upon injurious insects, 

 written by the master-hand of Professor Comstock or else under his 

 influence. The studies of Comstock and Slingerland were always made 

 in the most conscientious spirit and their bulletins original, thorough 

 and practical are models of what such works should be. 



More recently, Prof. C. R. Crosby and Prof. G. W. Herrick, of Cor- 

 nell, have published important contributions to economic entomology. 



The Geneva station has issued many excellent entomological 

 bulletins, the results of investigations by V. H. Lowe, F. A. Sirrine, 

 H. E. Hodgkiss, P. J. Parrott, and W. J. Schoene. 



Illinois. Mr. Benjamin D. Walsh, engaged in 1867 by the Illinois 

 State Horticultural Society, published in 1868, as acting state entomolo- 

 gist, a report in the interests of horticulture an accurate and 

 altogether excellent piece of original work. Like many other economic 

 entomologists he was a prolific writer for the agricultural press and his 

 contributions, numbering about four hundred, were in the highest degree 

 scientific and practical. 



Walsh was succeeded by Dr. William LeBaron, who published (1871 

 to 1874) four able reports of great practical value. In the words of Dr. 

 Howard, "He records in his first report the first successful experiment 

 in the transportation 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." 



Following LeBaron as state entomologist, Rev. Cyrus Thomas and 

 his assistants, G. H. French and D. W. Coquillett, produced a creditable 

 series of six reports (1875 to 1880) as part of a projected manual of the 

 economic entomology of Illinois. 



In 1882 Prof. S. A. Forbes was appointed state entomologist. His 

 reports and bulletins, based upon the labors of an able corps of assist- 

 ants, are among the best that have been produced. Of the eighteen 

 reports issued by Dr. Forbes, those dealing with the chinch bug, San 

 Jose scale, corn insects and sugar beet insects are especially noteworthy. 



The office of state entomologist was discontinued in 1917, without, 

 however, any interruption of the entomological work, which is now 



