5° Entomological Books. 
synopsis of the Hymenoptera of North America, together 
with a list of the described species. This is one of the 
many valuable publications of the American Entomolog- 
ical Society. : 
I will close this brief history with a notice of authors 
who are very serviceable to such as may desire to glean 
farther of the pleasures of systematic entomology; only 
remarking that at the end of the next chapter I shall refer 
to those who have been particularly serviceable in devel- 
oping the anatomy and physiology of insects, especially of 
bees. 
VALUABLE BOOKS FOR THE STUDENT OF ENTOMOLOGY. 
For mere classification, no work is equal to Westwood 
on Insects—two volumes. In this the descriptions and 
illustrations are very full and perfect, making it: easy 
to study the families, and even genera, of all the orders. 
This work and the following are out of print, but can be 
got with little trouble at second-hand book-stores. Kirby 
and Spence—Introduction to Entomology—is a very com- 
plete work. It treats of the classification, structure, habits, 
general economy of insects, and gives a history of the sub- 
ject. Itis an invaluable work and a great acquisition to 
any library. Dr. Packard’s Guide to the Study of Insects 
is a valuable work, and being American is specially to be 
recommended. ‘“Injurious Insects” is the title of two 
valuable books, one by Dr. T. Harris, and the other by 
Mary Treat. The Reports of Dr. T. Harris, Dr. A. 
Fitch, and Dr. C. V. Riley, the Illinois Entomological 
Reports, and the Entomological Reports of the Depart- 
ments of the Interior, and of Agriculture, will also be 
found of great value and interest. Cresson’s Synopsis, 
already referred: to, will be indispensable to every student 
of bees or other Hymenopterous insects, 
