The fly is not the smallest of winged things, on a level with gnats, midges, and still tinier creatures; it is as much larger than they as smaller than the bee. It has not feathers of the usual sort, is not fledged all over like some, nor provided with quill-feathers like other birds, but resembles locusts, grasshoppers, and bees in being gauze-winged, this sort of wing being as much more delicate than the ordinary as Indian fabrics are lighter and softer than Greek. Moreover, close inspection of them when spread out and moving in the sun will show them to be peacock-hued.

Its flight is accompanied neither by the incessant wing-beat of the bat, the jump of the locust, nor the buzz of the wasp, but carries it easily in any direction. It has the further merit of a music neither sullen as with the gnat kind, deep as with the bee, nor grim and threatening as with the wasp; it is as much more tuneful than they as the flute is sweeter than trumpet or cymbals.

As for the rest of its person, the head is very slenderly attached by the neck, easily turned, and not all of one piece with the body as in the locust; the eyes are projecting and horny; the chest strong, with the legs springing freely from it instead of lying close like a wasp’s. The belly also is well fortified, and looks like a breastplate, with its broad bands and scales. Its weapons are not in the tail as with wasp and bee, but in its mouth and proboscis; with the latter, in which it is like the elephant, it forages, takes hold of things, and by means of a sucker at its tip attaches itself firmly to them. This proboscis is also supplied with a projecting tooth, with which the fly makes a puncture, and so drinks blood. It does drink milk, but also likes blood, which it gets without hurting its prey much. Of its six legs, four only are for walking, and the front pair serves for hands; you may see it standing on four legs and holding up a morsel in these hands, which it consumes in very human fashion.

It does not come into being in its ultimate shape, but starts as a worm in the dead body of man or animal; then it gradually develops legs, puts forth wings and becomes a flying instead of a creeping thing, which generates in turn and produces a little worm, one day to be a fly. Living with man, sharing his food and his table, it tastes everything except his oil, to drink which is death to it. In any case it soon perishes, having but a short span of life allotted to it, but while it lives it loves the light, and is active only under its influence; at night it rests, neither flying nor buzzing, but retiring and keeping quiet.

I am able to record its considerable wisdom, shown in evading the plots of its enemy the spider. It is always on the look-out for his ambushes, and in the most circumspect way dodges about, that it may not be caught, netted, and entangled in his meshes. Its valour and spirit require no mention of mine; Homer, mightiest-voiced of poets, seeking a compliment for the greatest of heroes, likens his spirit not to a lion’s, a panther’s, a boar’s, but to the courage of the fly, to its unshrinking and persistent assault; mark, it is not mere audacity, but courage, that he attributes to it. Though you drive it off, he says, it will not leave you; it will have its bite. He is so earnest an admirer of the fly that he alludes to it not once nor twice, but constantly; a mention of it is felt to be a poetic ornament. Now it is its multitudinous descent upon the milk that he celebrates; now he is in want of an illustration for Athene as she wards off a spear from the vitals of Menelaus; so he makes her a mother caring for her sleeping child, and in comes the fly again. Moreover he gives them that pretty epithet, ‘thick-clust’ring’; and ‘nations’ is his d............