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n. pl. met·a·tho·rax·es or met·a·tho·ra·ces (-thôr′ə-sēz′)
The hindmost of the three divisions of the thorax of an insect, bearing the third pair of legs and the second pair of wings.

met′a·tho·rac′ic (-thə-răs′ĭk) adj.
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Thorax brownish red; pronotum brown, hexagonal, with a median carina strongly marked; pronotum with anterior margin straight, lateral-anterior margins straight, lateral posterior margin slightly sinuous, posterior margin grooved; scutellum brownish with slight central concavity, tegmina castaneous, apical plexus of veins developed; hindwings hyaline with brownish venation, vein Cu1 not thickened at base; legs brownish red; metathoracic tibia with two lateral spines (basal spine equal in size to spines in apical crown; apical spine larger than spines in apical crown); apical crown of spines on tibia consisting of two rows; basitarsus with three rows of spines covered by long setae; subungueal process present and triangular.
Dimensions (all legs): coxa 33-35 [micro]m long (at widest point), trochanter + femur 53-55 [micro]m long, with a very long femoral seta on each meso- and metathoracic legs, each very long femoral seta as long as or longer than length of tibia + tarsus + claw, tibia + tarsus, 59-60 [micro]m long, claw 12-13 [micro]m long.
Meso- and metathoracic pleura black, metathoracic episternum striped with ochre.
Brandmayr, "The reduction of metathoracic alae and of dispersal power of carabid beetles along the evolutionary pathway into the mountains," in Form andfunction in Zoology, G.
Ventral tubular ducts (vtbd) present, with a slender inner ductile (terminal filament), similar in length to outer ductule, each tubular duct with a well-developed gland present on area around mesothoracic and metathoracic coxae.
Pronotum twice as broad as long, and distinctly shorter in length than head length, lateral margins of pronotum anteriorly dentate, posteriorly a little sinuate, humeral angles quite subacute; length of pronotum 3.9 mm, width 8.0 mm; scutellum distinctly longer than broad at base, reaching to three-fourth of abdomen, apical lobe U-shape, length of scutellum 6.8 mm, width 4.9 mm, metathoracic scent gland complex (Fig.
The original interpretation of the metathoracic chaetotaxy by Soto-Adames (2002) indicated the absence of seta m2, a seta considered by Szeptycki (1979) to be diagnostic of Lepidocyrtini.
Number and distribution of prominent spiniform sensilla on pro- and metalegs as in Table III; sensillar distributions on metathoracic (Figures 2A, B) and mesothoracic legs are similar, only more numerous on former; complex sensilla, bearing unicellular processes present, more numerous ventrally and distally on femoral and tibial segments; posterior tarsal claws shorter than anterior claws.
Grass and leaf-cutting ants vary in behavior when cutting leaves, in part because grass cutting species tend to have shorter metathoracic legs than leaf-cutting species (Fowler et al.
It is characterized by the presence of a quadrate cell in the fore wing, the absence of the dorsal connexival suture, the reduction of the vermiform gland, and absence of the metathoracic scent glands (Weirauch, 2008).
Legs: Dark red-brown except for yellow-brown proximal region of metathoracic femora (Congo material with all tibiae and tarsi yellow-brown).
Anatomy, ultrastructure, and functional morphology of the metathoracic tracheal defense glands of the grasshopper Romalea guttata.