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"The typical genus of <i>Sironidae</i>. Two species inhabit Europe, one the Philippines, and another (undescribed) is found in the United States. Also called <i>Cyphophthalmus</i>." &mdash; Whitney, 1889 <p>Illustration of a small insect with eight legs.

Siro Americanus

"The typical genus of Sironidae. Two species inhabit Europe, one the Philippines, and another (undescribed)…

Antenna of leaf-eating beetle, showing smelling pits on the expanded terminal segments.

Antenna

Antenna of leaf-eating beetle, showing smelling pits on the expanded terminal segments.

Antenna of crayfish, with auditory sac at base.

Antenna

Antenna of crayfish, with auditory sac at base.

"The yard of a ship. The ships of the ancients had a single mast in the middle, and a square sail, to raise and support which a transverse pole, or yard, was extended across the mast, not far from the top. To the two extremities of the yard, ropes were attached, which passed over the top of the mast, and thus supported the yard: these ropes were called ceruchi. Sometimes the yard had two, and at other times four ceruchi, as in the annexed cut." &mdash; Smith, 1873

Antenna

"The yard of a ship. The ships of the ancients had a single mast in the middle, and a square sail, to…

"The yard of a ship. The ships of the ancients had a single mast in the middle, and a square sail, to raise and support which a transverse pole, or yard, was extended across the mast, not far from the top. To the two extremities of the yard, ropes were attached, which passed over the top of the mast, and thus supported the yard: these ropes were called ceruchi. Sometimes the yard had two, and at other times four ceruchi, as in the annexed cut. When a storm arose, or when the port was obtained, or before an engagement, the antenna was lowered to the middle of the mast. From numerous representations of ships on antique coins, intaglios, lamps, and bas-reliefs, we here select two gems, both of which show the velata antenna, but with the sail reefed to the one, and in the other expanded and swollen with the wind." &mdash; Smith, 1873

Antenna

"The yard of a ship. The ships of the ancients had a single mast in the middle, and a square sail, to…

"The yard of a ship. The ships of the ancients had a single mast in the middle, and a square sail, to raise and support which a transverse pole, or yard, was extended across the mast, not far from the top. To the two extremities of the yard, ropes were attached, which passed over the top of the mast, and thus supported the yard: these ropes were called ceruchi. Sometimes the yard had two, and at other times four ceruchi, as in the annexed cut. When a storm arose, or when the port was obtained, or before an engagement, the antenna was lowered to the middle of the mast. From numerous representations of ships on antique coins, intaglios, lamps, and bas-reliefs, we here select two gems, both of which show the velata antenna, but with the sail reefed to the one, and in the other expanded and swollen with the wind." &mdash; Smith, 1873

Antenna

"The yard of a ship. The ships of the ancients had a single mast in the middle, and a square sail, to…

This illustration shows an antenna of a male mosquito.

Antenna

This illustration shows an antenna of a male mosquito.

Various forms of insect Antennae.

Antennae

Various forms of insect Antennae.

auditory organ of a mollusk. a, auditory nerve; b, outer wall of connective tissue; c, cells with auditory hairs; d, otoliths

Auditory Organ

auditory organ of a mollusk. a, auditory nerve; b, outer wall of connective tissue; c, cells with auditory…

Grasshopper, showing auditory organ (a,o) in first segment of abdomen.

Auditory Organ

Grasshopper, showing auditory organ (a,o) in first segment of abdomen.

Cricket, showing auditory organ (a,o) in foreleg

Auditory Organ

Cricket, showing auditory organ (a,o) in foreleg

A male mosquito, showing auditory hairs (a.h.) on the antenna

Auditory Organ

A male mosquito, showing auditory hairs (a.h.) on the antenna

The antenna of the honey-bee.

Honey Bee

The antenna of the honey-bee.

"Head and Appendages of Honey-bee (Apis). a, Antenna or feeler. g, Epipharynx. mxp, Maxillary palp. pg, Opposite to galeae of 2nd maxillae (labium). mx, 1st maxilla. lp, Labial palp. l, Ligula or "tongue." b, Bouton or spoon of the ligula." &mdash; The Encyclopedia Britannica, 1910

Honey Bee

"Head and Appendages of Honey-bee (Apis). a, Antenna or feeler. g, Epipharynx. mxp, Maxillary palp.…

"Carrion-beetle (Silpha inaequalis). a, larva; d, same; f, g, h, mandible, labium, and maxilla of larva; i, j, anal process and antenna of same; m, one of the lateral processes. b, pupa; e, same; l, anal process of same. c, beetle; k, anterior tarsus of same." -Whitney, 1911

Carrion Beetle

"Carrion-beetle (Silpha inaequalis). a, larva; d, same; f, g, h, mandible, labium, and maxilla of larva;…

Erotylus boisduvali, a fungus beetle. "e, beetle; f, palpus; g, tarsus, from below; h, terminal joint of tarsus, from above; i, antenna." -Whitney, 1911

Fungus Beetle

Erotylus boisduvali, a fungus beetle. "e, beetle; f, palpus; g, tarsus, from below; h, terminal joint…

"Elaphidion parallelum ... a, larva; b, twig split open, showing inclosed pupa; k, severed end of twig; c, beetle; i, basal joints of an antenna, showing the characteristic spines at the tip of the third and fourth joints; j, tip of elytron; d, e, f, g, h, head, maxilla, labium, mandible, and antenna of larva." -Whitney, 1911

Long-Horned Beetle

"Elaphidion parallelum ... a, larva; b, twig split open, showing inclosed pupa; k, severed end of twig;…

"1. A serricorn beetle (an elater). 2, 3. Englarged antennae of other serricorns (species of Phyllocerus and Pachyderes)." -Whitney, 1911

Serricorn Beetle

"1. A serricorn beetle (an elater). 2, 3. Englarged antennae of other serricorns (species of Phyllocerus…

"Head of Scolopendra, from below, showing the epilabrum, the protomala with its cardo (Card), and stipes (St); Ant, antenna." -Whitney, 1911

Centipede Head

"Head of Scolopendra, from below, showing the epilabrum, the protomala with its cardo (Card), and stipes…

The female chalcid wasp (Eurytoma prunicola) is a parasitoid in the family Chalcididae.

Female Chalcid Wasp

The female chalcid wasp (Eurytoma prunicola) is a parasitoid in the family Chalcididae.

The male chalcid wasp (Eurytoma prunicola) is a parasitoid in the family Chalcididae.

Male Chalcid Wasp

The male chalcid wasp (Eurytoma prunicola) is a parasitoid in the family Chalcididae.

"Ventral aspect of male cockroach with the wings extended. An imaginary median line has been inserted. A., antennae; E., eye; P.T., prothorax; W1, first pair of wings; W2, second pair of wings; C., cercus; St., style; Co., coxa; Tr., trochanter; F., femur; Ti., tibia; Ta., tarsus." -Thomson, 1916

Cockroach

"Ventral aspect of male cockroach with the wings extended. An imaginary median line has been inserted.…

"A genus of Orthopterous insects, having an oval or orbicular flattened body, the head hidden beneath the large plate of the prothorax, long thread-like antennae, and wings folded only longitudinally. The elytra are parchment-like, and the wings are sometimes very imperfectly developed, particularly in the females, as in the case of the common cockroach." &mdash; Chambers' Encyclopedia, 1875

Female Cockroach

"A genus of Orthopterous insects, having an oval or orbicular flattened body, the head hidden beneath…

"A genus of Orthopterous insects, having an oval or orbicular flattened body, the head hidden beneath the large plate of the prothorax, long thread-like antennae, and wings folded only longitudinally. The elytra are parchment-like, and the wings are sometimes very imperfectly developed, particularly in the females, as in the case of the common cockroach." &mdash; Chambers' Encyclopedia, 1875

Male Cockroach

"A genus of Orthopterous insects, having an oval or orbicular flattened body, the head hidden beneath…

&quot;Resin-gnat (Diplosis resinicola). a, adult female; b, wing of same; c, cross-section of antenna of female; d, same of male; e, section of pine twig showing work of larvae; f, same showing extruded pupa-cases; a, e, f, enlarged; b, c, d, still more enlarged.&quot; -Whitney, 1911

Resin Gnat

"Resin-gnat (Diplosis resinicola). a, adult female; b, wing of same; c, cross-section of antenna…

"Appendages of Norway lobster. Ex., Exopodite: En., endopodite; protopodite dark throughout; Ep., epipodite. 1. Antennule--E., position of ear; 2., antenna--K., opening of kidney; 3. mandible--P., palp; 4. first maxilla; 5. second maxilla--B., baler; 6. first maxillipede; 7. second maxillipede; 8. third maxillipede--the basal joint of the protopodite is called coxopodite, the next basipodite; the five joints of the endopodite are called--ischiopodite (i.); meropodite (m.); carpopodite (c.); propodite (p.); dactylopodite (d.); 9. forceps--(7) coxopodite; (6) basipodite, the joints of the endopodite are numbered; 10-13. walking legs; 14. modified male appendage; 15-18. small swimmerets; 19. large paddles." -Thomson, 1916

Norway Lobster Appendages

"Appendages of Norway lobster. Ex., Exopodite: En., endopodite; protopodite dark throughout; Ep., epipodite.…

"The head of female mosquito (culex). a, antenna; c, clypeus; h, hypopharynx; m, mandibles; ma., maxillas; m.p., maxillary palpus; l, labium; la., labrum (epi-pharynx)." &mdash; Galloway

Mosquito Head

"The head of female mosquito (culex). a, antenna; c, clypeus; h, hypopharynx; m, mandibles; ma., maxillas;…

Scelio is a genus of parasitic insects of the Proctotrypidae family. "Scelio famelicus. a, female; b, her antenna." -Whitney, 1911

Scelio

Scelio is a genus of parasitic insects of the Proctotrypidae family. "Scelio famelicus. a, female; b,…