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The aquatic larva of a large American winged insect (Corydalus cornutus), much used a fish bait by anglers; the dobson. It belongs to the Neuroptera.

One of the partially thickened anterior wings of certain insects, as of many Hemiptera, the earwigs, etc.

A neuropterous insect of the genus Hemerobius, and allied genera.

Those insects which have an incomplete metamorphosis.

An order of hexapod insects having a jointed proboscis, including four sharp stylets (mandibles and maxillæ), for piercing. In many of the species (Heteroptera) the front wings are partially coriaceous, and different from the others.

Having females very unlike the males in form and structure; -- as certain insects, the males of which are winged, and the females wingless.

s of existence, or in different individuals of the same species; -- applied especially to insects in which there is a wide difference of form between the larva and the adult, and to plants having more than one form of flower.

The true, or six-legged, insects; insects other than myriapods and arachnids.

A little case in which certain insects pass the winter.

nter in close quarters, in a torpid or lethargic state, as certain mammals, reptiles, and insects. Inclination would lead me to hibernate, during half the year, in this uncomfortable climate of Great Britain. Southey.

A genus of dipterous insects including the horsefly or horse tick. -- Hip`po*bos"can, a.

Those insects which have a complete metamorphosis; metabola.

Having a complete metamorphosis;-said of certain insects, as the butterflies and bees.

The possession of but one kind of larvæ or young, as in most insects.

e been called by this name; one exuded from the plants, and the other secreted by certain insects, esp. aphids.

(Phorodon humuli), very injurious to hop vines. -- Hop froth fly (Zoöl.), an hemipterous insect (Aphrophora interrupta), allied to the cockoo spits. It often does great damage to hop vines. -- Hop hornbeam (Bot.), an American tree of the genus Ostrya (O.Virginica) the American ironwood; also, a European species (O. v…

An appliance for the destruction of insects, consisting of a shallow iron box, containing kerosene or coated with tar or other sticky substance, which may be mounted on wheels.

of a bird, as in the horned owl. (c) A hornlike projection from the head or thorax of an insect, or the head of a reptile, or fish. (d) A sharp spine in front of the fins of a fish, as in the horned pout.

hornet (V. maculata) is larger and has similar habits. Hornet fly (Zoöl.), any dipterous insect of the genus Asilus, and allied genera, of which there are numerous species. They are large and fierce flies which capture bees and other insects, often larger than themselves, and suck their blood. Called also hawk fly, ro…

Any one of family (Uroceridæ) of large hyminopterous insects, allied to the sawflies. The larvæ bore in the wood of trees. So called from the long, stout ovipositors of the females.