Why is the larva of the glow-worm proverbial for its cleanliness?

Because it has an instrument at the tail consisting of white cartilaginous rays, disposed in a circle, one row within another, and retractile similar to the horns of a snail, which the insect employs for cleansing"itself. This contrivance operates by suction, and not as a comb, brush, or wiper, and is furnished with a sort of funnel-shaped pocket, formed by the converging rays, into which are collected dust, etc. from the body, and the accumulated pellet is then extruded, and carefully placed where it might be out of the way of again soiling the glossy skin of the insect. This skin is of a soft leathery appearance; exhibiting, when magnified, a minute delicate dotting, similar to shagreen. The instrument being expanded over this shagreened surface, is drawn out with an evident effort, in the same way as boys draw the moist leather suckers, when they amuse them in dragging stones after them. All dust, etc. is then detached from the skin, and by a peculiar movement of the retractile rays, is lodged in the funnel-shaped pocket. This instrument also assists the animal to walk, and particularly to maintain a position against gravity, which its feet are ill calculated to effect. - Mr. Rennie, in Journ. Royal Instit. {abridged.)

Why is the lampyris, or five-fly, so highly prized in India?

Because the Indians believe them to be the spirits of their departed ancestors. Sir James E. Smith informs us that the beaux of Italy sometimes adorn the head-dresses of the belles with these " stars of the earth and diamonds of the night." Mr. Murray also says, " I remember, one fine night, on coming from Arqua (once the residence of Petrarch) to Padua, that the whole trees and hedges, to the very summit, were illuminated with myriads of these living diamonds - the effect was magically magnificent."

Why is the baya bird of India supposed to light his nest with fireflies?

Because he catches the flies at night, and confines them with moist clay or cow dung. Bishop Heber says, " as the light of the flics could be of little use to the baya, it seems probable that he only feeds on them."