from The American Heritage® Dictionary of the English Language, 4th 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The hindmost of the three sections of the thorax of an insect
from the GNU version of the Collaborative International Dictionary of English
- n. The last or posterior segment of the thorax in insects. See Illust. of coleoptera.
from The 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
Sorry, no etymologies found.
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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