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den or half covered; said of the head of an insect when half covered by the shield of the thorax.

wasps of the genus Sphex and allied genera. These wasps have the abdomen attached to the thorax by a slender pedicel. See Illust. of Sand wasp, under Sand. Sphex fly (Zoöl.), any one of numerous species of small dipterous flies of the genus Conops and allied genera. The form of the body is similar to that of a sphex.…

eyes are usually eight in number (rarely six), and are situated on the back of the cephalothorax. See Illust. under Araneina.

and arachnids. They are variable in number, and are usually situated on the sides of the thorax and abdomen, a pair to a segment. These openings are usually elliptical, and capable of being closed. See Illust. under Coleoptera.

s the heart and lungs, by conveying to the ear of the examiner the sounds produced in the thorax.

ing; a shake; esp. (Med.), a shaking of the body to ascertain if there be a liquid in the thorax.

Of or pertaining to the thorax, or chest. Thoracic duct (Anat.), the great trunk of the lymphatic vessels, situated on the ventral side of the vertebral column in the thorax and abdomen. See Illust. of Lacteal.

A remodeling or reshaping of the thorax; especially, the operation of removing the ribs, so as to obliterate the pleural cavity in cases of empyema.

other mammals it is the throat, or neck, sweetbread, which lies in the upper part of the thorax and lower part of the throat. It is largest in fetal and early life, and disappears or becomes rudimentary in the adult.

of trees, and injure them by sucking the sap. Many of them are very odd in shape, the prothorax being often prolonged upward or forward in the form of a spine or crest. -- Tree jobber (Zoöl.), a woodpecker. [Obs.] -- Tree kangaroo. (Zoöl.) See Kangaroo. -- Tree lark (Zoöl.), the tree pipit. [Prov. Eng.] -- Tree liza…

The thorax of an insect. See Trunk, n., 5.

ody of an insect which is between the head and abdomen, and bears the wings and legs; the thorax; the truncus.

Any large beetle having a hornlike prominence on the head or prothorax.

of a medium or low pitch and of a sonorous quality ascribed to resonance in the chest, or thorax; voice of the thick register. It is produced by vibration of the vocal cords through their entire width and thickness, and with convex surfaces presented to each other. -- Head voice (Phon.), a kind of voice of high pitch…

That part of the human body which is immediately below the ribs or thorax; the small part of the body between the thorax and hips. Chaucer. I am in the waist two yards about. Shak.

status) which sucks the blood of other insects. So named from the curious shape of the prothorax. -- Wheel carriage, a carriage moving on wheels. -- Wheel chains, or Wheel ropes (Naut.), the chains or ropes connecting the wheel and rudder. -- Wheel cutter, a machine for shaping the cogs of gear wheels; a gear cutter…

y one of several species of small South American humming birds belonging to the genus Calothorax. The male has a brilliant gorget of blue, purple, and other colors. -- Wood sucker (Zoöl.), the yaffle. -- Wood swallow (Zoöl.), any one of numerous species of Old World passerine birds belonging to the genus Artamus and…