The young when hatched are naked and helpless.
The duck, on the other hand, when newly hatched, and for nearly a month after, has the sternum wholly cartilaginous.
The larva is, hatched two or FIG.
The grubs, when hatched, start galleries nearly at right angles to this, and when fully grown form oval cells in which they pupate; from these the young beetles emerge by making circular holes directly outward through the bark.
Similarly the newly-hatched larva of an oil-beetle (Meloe) is an active little campodeiform insect, which, hatched from an egg laid among plants, waits to attach itself to a passing bee.