Books Published by the same A ulhors. 
An INTRODUCTION to ENTOMOLOGY: 
Or, Evements of the Naturav History of Insects. 
By WILLIAM KIRBY, M.A. F.R. and L.S. 
And WILLIAM SPENCE, Esa. F.L.S. 
Volume the First, illustrated by Coloured Plates. In 8vo, the 
Fourth Edition, enlarged and improved, price 18s. 
This work is intended as a general and popular history of Insects. 
The present volume contains a statement of the injuries they occasion 
(including an account of those insects which cause diseases in the human 
frame, and of those which are noxious to the farmer and horticulturist, ) 
the benefits derived from them, the metamorphoses they undergo, their 
affection for their young, their various kinds of food, and the means by 
which they procure it ; ‘and lastly, a description of their habitations. 
The remaining volumes will be given with all convenient speed. 
Published by Mr. Kinsy, 
MONOGRAPHIA APUM. ANGLLE: 
Or, An Attempt to divide into their natural Genera and Fami- 
lies such Species of the Linnean Genus Aris as have been 
discovered in England, In two volumes 8vo, with plates. 
Price Ji. Is. 
Published by Mr. SrENcE, 
In one closely printed Volume, 8vo, price 7s. Boards, 
TRACTS on POLITICAL ECONOMY. Viz. 1. Britain 
independent of Commerce; 2. Agriculture the Source 
of Wealth; 3. The Objections against the Corn Bill re- 
futed ; 4, Speech on the East India Trade. With Prefatory 
Remarks on the Causes and Cure of our Present Distresses, 
as originating from Neglect of Principles laid dewn in these 
Works. 
