PTINUS, a genus of insects belonging to the order of coleoptera. The antennæ are filiform: The last or exterior articulations are longer than the others: The thorax is nearly round, without a margin, into which the head is drawn back or received: The feet are made for leaping. The most remarkable species are,
1. The pectinicornis. This is produced from a worm that lodges in wood and the trunks of trees, such as the willow, where it makes deep round holes, turns to a winged insect, takes flight, and roosts upon flowers. It is distinguished by its antennæ pectinated on one side