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"Everything indicates that these organs play a very important part in the life of insects."

Antenna of a Species of Asida

"Everything indicates that these organs play a very important part in the life of insects."

"Everything indicates that these organs play a very important part in the life of insects."

Antenna of Zygia Oblonga

"Everything indicates that these organs play a very important part in the life of insects."

A bee

Bee Feeler

A bee

When both sides of the joints have these processes the antenna is said to be <em>bipectinated</em>.

Bipectinate Antenna

When both sides of the joints have these processes the antenna is said to be bipectinated.

Bunches of stiff bristly hair.

Bristle-Tufted Antenna

Bunches of stiff bristly hair.

A feeler is clubbed, or <em>capitate</em>, when the joints toward or at the tip suddenly or gradually enlarge to form a more or less evident club or bulb, and this type is widely distributed in all the orders, a variety of terms being in use to indicate the particular form of the club.

Capitate Antenna

A feeler is clubbed, or capitate, when the joints toward or at the tip suddenly or gradually…

fringed

Ciliated Antenna

fringed

A feeler is clubbed, or <em>clavate</em>, when the joints toward or at the tip suddenly or gradually enlarge to form a more or less evident club or bulb, and this type is widely distributed in all the orders, a variety of terms being in use to indicate the particular form of the club.

Clavate Antenna

A feeler is clubbed, or clavate, when the joints toward or at the tip suddenly or gradually…

Thread like antenna when the joints are nearly even throughout, cylindrical, tolerably equal in length, and similar in general appearance.

Filiform antenna

Thread like antenna when the joints are nearly even throughout, cylindrical, tolerably equal in length,…

As a rule, the antennae are straight, without break from base to tip; but occasionally they are <em>geniculate</em>, or elbowed; that is to say, there is one very long basal joint, the "scape," followed by a series of smaller segments se in at right angles to it.

Geniculate Antenna

As a rule, the antennae are straight, without break from base to tip; but occasionally they are geniculate,…

A <em>lamellate</em> feeler has at its tip a series of elongate, flattened or leaf-like joints, usually applied close together to form a solid mass that conceals and protects the delicate sensory structure on the inner surface.

Lamellate Antenna

A lamellate feeler has at its tip a series of elongate, flattened or leaf-like joints, usually…

An antenna is <em>moniliform</em>, or bead-like, when the joints are more or less spherical and set together in such a way as to resemble a series of beads on a string.

Moniliform Antenna

An antenna is moniliform, or bead-like, when the joints are more or less spherical and set…

When the processes become very slender, almost hair-like, and exceedingly numerous, it is said to be <em>plumose</em>.

Plumose Antenna

When the processes become very slender, almost hair-like, and exceedingly numerous, it is said to be…

A <em>serrate</em> or saw toothed antenna has the joints more or less triangular in shape and so fitted the one margin resembles the toothed edge of a saw.

Serrate Antenna

A serrate or saw toothed antenna has the joints more or less triangular in shape and so fitted…

Setaceous.

Setaceous Antenna

Setaceous.

<em>Pectinated</em> or comb-toothed type, where the joints are furnished laterally with processes of variable length.

Singly Pectinate Antenna

Pectinated or comb-toothed type, where the joints are furnished laterally with processes of…

A bee's stinger, sheath in which sting works.

Stinger

A bee's stinger, sheath in which sting works.

A bee's stinger, sitting proper.

Stinger

A bee's stinger, sitting proper.