ORDER III.

Lepidoptera, or scaly-winged.--- it consist of butterflies and moths. The powder on the wiugs of these insects has been said to consist of acall feathers ; but more accurate observation shows that they are minute scales, of various shapes and sizes in the different species,_ and eveti in the different parts of the same insect. The prevailing shape,, however, is that of a fan, and they are ranged one over the other, like the tiles of a house.

ORDER IV.

Neuroptera, or nerve-winged.-w-' he insects of this class are remarkable for the strength of their wings, which resemble a net-work of fine wire. rThicy are always four in number. The order is beautifully exemplified in the libellula or dragon-flies.

OItl)ER V

Hyrnenoptera.-lt consists of insects fur nished with four niembranaccous wings, and also with a sting, or something resembling one. ;fake the wasp and the bee for examples.

ORDER VI.

Dtera.-Jt contains those insects that have