XXV1 PREFACE TO THE SECOND EDITION. 
the Zoological Illustrations of M. Swainson, and in the Zoolo- 
gical Journal published by able naturalists in London. The 
Journals of the Lyceum of New York, and of the Academy of 
Natural Sciences of Philadelphia, are not less precious; but in 
proportion as the taste for natural history becomes extended, 
and the more numerous the countries in which it is cultivated, 
the number of its acquisitions increase in geometrical pro- 
gression, and it becomes more and more difficult to collect all 
the writings of naturalists, and to complete the table of their 
results; I rely therefore on the indulgence of those whose ob- 
servations may have escaped me, or whose works I may not 
have sufficiently studied. 
My celebrated friend and colleague M. Latreille, as in the 
first edition, having consented to take upon himself the im- 
portant and diflicult subject of the Crustacea, Arachnides and 
Insects, will himself point out the path he has pursued; so 
that on these points I need say nothing more here. 
Jardin du Roi, October 1828, 
