The primary division of the class Insecta, now adopted, is into orders, Lepidoptera (called farinaceous by Drury), Coleoptera (called crustaceous by Drury), &c.
In consequence of the great increase of the science it has been found necessary to divide the Orders of Insects into Sections, Families, Subfamilies, &c. before arriving at Genera, which are now much more limited than in the time of Linnæus.
There is no branch of natural history where the existence of a Lusus Naturæ is so plain and observable as in this, particularly among the insects brought from warm climates; where the wantonness and luxuriance of nature is so great; that its laws, strict and regular as they are, through the rest of the animal creation, almost seem to be invaded and broke in upon. Instances, also, are frequent in this study, of a cluster of eggs being discharged by a female, the insects springing from which, have differed in the circumstances above-mentioned so very greatly, as in some cases to be mistaken for different species.
In these definitions, I have thought it serviceable to give the modern names without introducing those, now out of use, employed by Drury, &c. The most conspicuous parts are alone noticed. (J. O. W.)
By five eyes, I mean those that have three lesser ones, as in Plate [43], [44], [45], &c. See the Plate in the Preface, fig. 4.