“ENTOMOLOGY”’ 
WITH SPECIAL REFERENCE TO ITS 
Biological and Economic Aspects 
By JUSTUS WATSON FOLSOM, Sc.D. (Harv.) 
Instructor in Entomology at the University of Illinois. 
With 5 Plates (1 Colored) and 300 other Illustrations. Octavo; 485 pages. Cloth, 
$2.00 net. 
PRESS OPINIONS. 
““Entomology,’ by Dr. Justus W. Folsom, is an advance over all other American 
works of its kind. It should be in the hands of every entomologist or entomological 
student, and in every public library. A most careful and painstaking work, contain- 
ing much information that only an expert has heretofore known where to find.” — 
Mr. F. M. Webster, in charge of the Cereal and Forage Crops Insect Investigations, 
Department of Agriculture at Washington. 
“Tt is a beautifully gotten-up book, of great scientific value... .We congratulate 
you upon publishing such a high grade work.’— Farm Journat, Philadelphia. 
‘““A very valuable addition to the general work on the subject. It covers much 
ground not touched by the other books on insects.”— ENTromMoLogicaL NEws. 
(Published by the Academy of Natural Sciences, Philadelphia.) 
“This is an eminently satisfactory work on insects, both from the standpoint of 
the school and of the general reader. It is the first adequate treatment of this subject 
as adapted to the science of entomology, and at the same time to agriculture, horti- 
culture and forestry. It teaches every fact about insects that it is desirable to know 
from the point of view of popular science, and literally all that need be known from 
the economic. This isan admirable realization of the dream of the schoolmaster and 
of the general reader for a book at once comprehensive, concise and attractive.” — 
JOURNAL OF Epucation, Boston. 
COMPLETE CATALOGUE FREE UPON REQUEST 
P. BLAKISTON’S SON & CO., Publishers, Philadelphia 
P1602” 
be.) )2 
