INTRODUCTION TO PARTS 1, II, AND III. 
V 
The object of the present lists is to record the principal entomolog¬ 
ical writings of B. D. Walsh and C. V. Riley. Few will be likely to 
criticize the association of the names of Walsh and Riley in a list of this 
kind, so largely devoted to economic entomology, or to question the 
desirability of collating their writings in advance of others. 
As recognized authorities upon entomology, especially from an 
economic standpoint, their writings have been extensively quoted 
sometimes with, but frequently without, credit in the agricultural and 
horticultural journals of the day. These secondary references, though 
of a certain value when the original is inaccessible, have, as a rule, 
been omitted. In citing such as are given I have used my personal 
judgment. To have given all would have increased the size of the list 
considerably with but a slight increase in its usefulness. 
Occasionally, a publisher to meet some popular demand puts the 
writings of an author into book form without the knowledge of the 
latter. Such an occurrence has happened more than once with Dr. 
Riley’s writings. To mention but one: In 1877 Messrs. George Rut¬ 
ledge & Sons, of London, published “The Colorado beetle, with sug¬ 
gestions for its repression and methods of destruction,” with Dr. Riley’s 
name upon the title-page as author. This is a partial reprint of Potato 
Pests entirely unsanctioned and published without knowledge of the au¬ 
thor. (See London Times, October 17, 1887.) These publishers’ re¬ 
prints are omitted from this list. The “ S.-b.” after the reference of many 
of the articles from the agricultural and other journals refers to the 
series of scrap-books used in divisional work. 
A biographical sketch of Dr. Walsh is given in the second volume of 
the American Entomologist, Yol. II, No. 3, pp. 65-68, January, 1870. 
The chief facts in Dr. Riley’s life may be found in the “Common¬ 
wealth of Missouri ” (1875) and the National Farmer, September 20,1883. 
In the preparation of the list I have freely used all data accumulated 
by the Division, notably the work of Mr. B. P. Mann and a private 
list of Dr. Riley’s. 
Many persons, both within and without the Department, have kindly 
answered my inquiries.—S. H. 
7 
