metathorax


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metathorax

(mĕt′ə-thôr′ăks′)
n. pl. meta·thoraxes or meta·thoraces (-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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

metathorax

the posterior of the three thoracic segments in insects, bearing the third pair of jointed legs and the hind pair of wings.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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One pair of setae on each mesothorax and metathorax segment, and a pair on abdominal segment VIII, each arising from a tubercular base along the anterior-lateral margin of the vasiform orifice.
Dorsal view: prothorax smooth, not square-shaped with two dorsolateral horn-like structures that protrude only slightly; mesothorax with four and metathorax with two tiny setae; abdominal segments with spiracles extruded slightly, abdominal segments three to seven dorsally with short medially located setae; cremaster round with four pairs of curved setae.
As pointed out by Soto-Adames (2002), the dorsal chaetotaxy of the metathorax and 1st abdominal segments in Metasinella is reduced with respect to most Lepidocyrtus and Pseudosinella (cf.
Mesothorax and Metathorax.- Scutellum black, quadrate, clothed with dense white hairs; elytron about twice as long as broad; striae deep, punctate, strial intervals punctulate; distance between striae at base subequal; striae 2, 3 and 4 with small denticles at their bases; humerus punctulate, glabrous, shiny black (Fig.
Metathorax + propodeum glossy, with anterior surface unsculptured; posterior surface transversely striate.
Legs: profemora about 3/4 length of mesothorax, mesofemora slightly longer than metathorax, metafemora slightly projecting over posterior margin of abdominal segment IV and metatibiae roughly reaching to abdominal segment VIII.
4I); scutellum with small round medial depression; hemelytra smooth, with row of punctures along claval suture; metathorax above scent gland evaporatory area with sensillae originating from deep round depressions (as in P.
Metathorax + propodeum shiny, with track of median longitudinal furrow, with disc and anterior surface partly smooth and partly rugose; posterior surface strongly transversely striate.
Pleura with setae like those on face, setae becoming longer and more simple ventrally (i.e., minute branches become gradually shorter and effectively disappear); metepisternum with setae like those on metathorax, with short, appressed setae concentrated along upper margin.