1631. ORTHOPTERA. This order is distinguished by the fore pair of wings being of a leathery texture, intermediate between the horny wing-cases of the beetles and the membranous wings of flies; they also lap over the hind pair when the insects are at rest. The mouth is armed with strong jaws for mastication; and the insects are active throughout their whole existence; the larvï¾µ and pupï¾µ resembling the perfect insects, except that in the former the wings are entirely wanting, whilst in the latter they appear as rudiments on the back. The chief divisions are the cock-roaches (Blattidï¾µ), the exotic praying mantes (Mantidï¾µ), and walking-stick insects (Phasmidï¾µ), and the different kinds of locusts, grasshoppers, and crickets.