American Heritage® Dictionary of the English Language, Fourth Edition
- n. The hindmost of the three divisions of the thorax of an insect, bearing the third pair of legs and the second pair of wings.
Century Dictionary and Cyclopedia
- n. In entomology, the third and last segment of the thorax, succeeding the mesothorax, preceding the abdomen, and bearing the third pair of legs and the second pair of wings
GNU Webster's 1913
- n. (Zoöl.) The last or posterior segment of the thorax in insects. See
“Black; the antennæ and legs ferruginous; the head and thorax rugose; the prothorax transverse, its anterior margin slightly curved, with the lateral angles produced forwards and very acute; the thorax narrowed to the metathorax, which is armed with two divergent acute spines.”
“_ The specimens from Aru differ from the typical ones in wanting the two longitudinal yellow lines on the metathorax, which is entirely black.”
“Head, antennæ, thorax, and legs honey-yellow and very smooth and shining; thorax strangulated at the base of the metathorax, which is not spined; the first node of the abdomen is oblique anteriorly, and vertical behind, the second node subglobose.”
“My first estimate of its size had been a little conservative; it was one of those fat moths with round thoraxes; the metathorax was especially round, looking like a witch's idea of a pot pie.”
“_Thorax_, oblong-ovate in the _female_, in the _worker_ transverse in front and narrowed behind with the metathorax bidentate; the anterior wings with one elongate marginal cell and two submarginal cells, the second extending to the apex of the wing; the legs stout, the femora incrassate; abdomen ovate, the peduncle with two nodes.”
“Thorax not quite so wide as the head anteriorly, narrowed behind, with the disk somewhat flattened, slightly convex, a deep strangulation between the meso - and metathorax, the latter obliquely rounded; the legs and abdomen sprinkled with glittering white hairs.”
“Thorax rounded above, the sides not margined; two spines on the thorax anteriorly, two on the metathorax, and two on the scale of the petiole; the legs elongate, with the anterior tibiæ ferruginous.”
“Reddish-brown, covered with a thin cinereous pubescence; the clypeus acutely angular anteriorly; the metathorax oblique and delicately striated transversely; wings fusco-hyaline; the petiole of the abdomen long, the segment campanulated and narrow.”
“Black; a narrow line of pale fulvous pubescence on the margin of the thorax in front, a patch of the same colour on each side of the metathorax, and the basal segment of the abdomen covered above with similar pubescence; the apical margin of the third and fourth segments, and the fifth and six entirely, covered with bright brick-red pubescence; the wings black, with coppery iridescence.”
“Head and abdomen jet-black; the antennæ, thorax, and legs of a clear honey-yellow; the mandibles of a more obscure yellow; the anterior margin of the thorax transverse, the lateral angles acute, narrowed from thence to the base of the mesothorax, the disk anteriorly slightly convex; the metathorax armed with two acute spines.”
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