erecping on the mountains of purple porphyry, were of the same colour; a peculiarity be stowed upon them for the benevolent purpose of concealing them from birds, or some other enemies.

The last genus in this order is that of .Nutila. Their habits have a great affinity to those I have just described; hut they are larger, and their, colours are more lively. These bcauti ful insects are inhabitants of the ground, arid are to be sought under the moss, where they love to conceal themselves, when they find a hollow space beneath it. They are swift in motion, and their wings shine like pearls. But sonic of them are without wings, which probably marks the distinction of sex. They are said to live together in small communities.

The sixth order, DIPTEItA, presents a race of insects that have two wings, and two poiSetS; the first genus of which is Oestrus, or Gad-fly. Various are the substances from rhick instinct directs the minute tribe of in sects to select a nidus for their young. We have already seen that the ichneumon deposits her eggs in the bodies of living insects, the Sphcx in those of (lead ones, while the Oestrus inserts tiers in (lifiCrelit parts of the bodies of quadrupeds, confining her operations, wit It ;curious skill, to those parts only that will an

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