An order or suborder of insects having (like the Hemiptera) a jointed beak, but in which the forewings are either wholly membranous or wholly leathery. The Cicadae, froghoppers, and Aphides, are well-known examples.

The offspring of the union of two distinct species.

An order of insects possessing biting jaws and usually four membranous wings in which there are a few veins. Bees and wasps are familiar examples of this group.

Excessively developed.

A family of hymenopterous insects, the members of which lay their eggs in the bodies or eggs of other insects.

The perfect (generally winged) reproductive state of an insect.

The aboriginal animal or vegetable inhabitants of a country or region.

The mode of arrangement of the flowers of plants.

A class of microscopic animalcules, so called from their having originally been observed in infusions of vegetable matters. They consist of a gelatinous material enclosed in a delicate membrane, the whole or part of which is furnished with short vibrating hairs (called cilia), by means of which the animalcules swim through the water or convey the minute particles of their food to the orifice of the mouth.

Feeding on insects.

Those animals which do not possess a backbone or spinal column.

Spaces left among the tissues in some of the lower animals and serving in place of vessels for the circulation of the fluids of the body.

Furnished with lamellae or little plates.