52 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL.84 



Walsh's bibliography shows 385 titles of individual record, to 

 which must be added nearly 500 more which are accredited to Walsh 

 and Riley. Of these 500 titles, however, the majority are short notes 

 and answers to correspondents in the columns of The American 

 Entomologist. 



Walsh died on Thanksgiving Day, November 18, 1869, as the 

 result of a railway accident six days earlier. 



It seems important that an attempt should be made, not perhaps to 

 analyze the work of this man, important as it was in the annals of 

 American. economic entomology, but at least to indicate its breadth 

 and extent. 



A number of earlier papers, beginning with i860, were published 

 in The Prairie Farmer, The Western Rural, The Illinois Farmer, 

 The St. Louis \'alley Farmer, and the Journal of the Illinois State 

 Agricultural Society. They dealt with various injurious insects which 

 were common year by year. His first extensive paper was on the 

 Pseudoneuroptera of Illinois, which included descriptions of over 

 40 new species and was published in the Proceedings of the Academy 

 of Natural Sciences in Philadelphia in 1862. Later in the same year 

 he published in the Proceedings of the Entomological Society of 

 Philadelphia a very considerable paper on the genera of Aphididae 

 found in the United States ; and early the next year, in the same 

 Proceedings, occurs an interesting paper on the dimorphism of 

 Papilio glaiicits and P. turnus, citing a similar case among the Pieri- 

 dae and an analogous one among the Dytiscidae. An important paper 

 published in the Proceedings of the Boston Society of Natural His- 

 tory in 1864 is entitled " On Certain Remarkable or Exceptional Lar- 

 vae, Coleopterous, Lepidopterous, and Dipterous, with Descriptions 

 of Several New Genera and Species, and of Several Species Injuri- 

 ous to Vegetation." The very next month there was published in the 

 Proceedings of the Entomological Society of Philadelphia a very 

 imj^ortant paper entitled " On Dimorphism in the Hymenopterous 

 Genus Cynips, with an Appendix Containing Hints for a New Clas- 

 sification of Cynipidae and a List of Cynipidae including Several 

 New Species Inhabiting the Oak Galls of Illinois." This paper is 

 especially notable because it brings up the point of possible alterna- 

 tion of generations with the Cynipidae, an idea subsequently elabo- 

 rated with great kudos by Adler of Germany. 



Although W^alsh at first was not enthusiastic in his support of 

 Darwin, in 1864 he came quite to his side and in a long pai:>er entitled 

 " On Certain Entomological Speculations of the New England School 

 of Naturalists," ])u])lished in the Proceedings of the Entomological 



