208 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Introductory Literature. 
To the student of Orthoptera who seeks to gain an acquaintance 
with their North American representatives, three works by S. H. 
Scudder are indispensable as a foundation. The first is the 
"Guide to the Genera and Classification of North American 
Orthoptera" (Cambridge, 1897, E. W. Wheeler, publ.) which 
contains keys to the genera then recognized, bibhographical 
notes, and a Hst of the works referred to. (2) Scudder's "Index 
to North American Orthoptera," published by this Society in 
1901 (Occasional Papers, vol. 6), contains all known references 
up to that year and a complete bibUography of the literature 
cited. (3) Scudder's "Catalogue of the Described Orthoptera of 
the United States and Canada" (Proc. Davenport Acad. Nat. 
Sci., 1900, vol. 8) hsts the species known at that time, and states 
their general distribution. 
Two excellent introductory works on the Orthoptera of Indiana 
and Minnesota but of much wider general appUcation, have been 
published. The first is by Professor W. S. Blatchley (27th 
Ann. Rept. Dept. Geol. and Nat. Resources of Indiana for 1902, 
1903, vol. 9, p. 123^71); the second by Professor Otto Lugger 
(3d Ann. Rept. State Exp. Sta., Univ. Minn, for 1897, 1898, xi+ 
296 pp.). From these two works many of the illustrations in 
this Manual are drawn. 
For further references to helpful literature the family headings 
in the following pages should be consulted. 
History of New England Orthopterology. 
In the scientific field we are indebted to Dr. T. W. Harris for 
the first considerable account of our Orthoptera in his "Report 
on the Insects of Massachusetts" published in 1833 but better 
known in the edition of 1862 under the name: "A Treatise on 
some of the Insects injurious to Vegetation." In this work 
about fifty pages of text, four colored figures, and seventeen wood- 
cuts were devoted to these insects. Dr. Harris enumerated 39 
species, chiefly Acridians; a fourth of these are synonyms but 
several of our Orthoptera were first described by him. 
