Metapleural bristles: in Diptera, are inserted in the metapleura.
Metapneustic: larva, chiefly dipterous, in which the spiracles are confined to the posterior segment.
Metapnystega: that circular area of metanotum behind the postscutellum.
Metapodeon: the abdomen behind the podeon or petiole in Hymenoptera.
Metasternal: relating or attached to the metasternum.
Metasternal epimera: small sclerite separating the metasternal episterna from the ventral segments.
Metasternal episterna: sclerite situated on each side of the Metasternum, immediately behind the mesosternum epimera.
Metasternellum: the sternellum of the metathorax.
Metasternum: the underside or breast of the metathorax.
Metastigma: in Odonata, the spiracles of third thoracic segment.
Metastoma: in Orthoptera:= hypopharynx: q.v.
Metatarsus: applied to basal joint of tarsus, where that differs greatly in length or otherwise from the other joints: see sarothrum.
Metathoracotheca: the pupal covering of the meta-thorax.
Metathorax: the third thoracic ring or segment; bears the hind legs and second pair of wings; variably distinct; sometimes closely united with the mesothorax and sometimes appearing as a portion of the abdomen.
Metatype: is a specimen named by the author after comparison with the type; according to some, it should be also a topotype.
Metazona: in Orthoptera, the dorsal surface of the prothorax behind the principal sulcus.
Metepimeron: in Odonata, lies behind the second lateral suture and extends ventrally to the sternum.
Metepisternum: in Odonata, is the sclerite between the first and second lateral thoracic sutures.
Meter: the standard of length in the metric system = 39.37 inches: see centimeter and millimeter.
Meticulose -us: is a maculation in the form of a series of colored flames.
Metinfraepisternum: in Odonata; the sclerite just above base of 3d coxa; below metepisternum and before metepimeron.
Metochy: the relation borne to ants by the tolerated guests in ant-hills; demanding nothing from and giving nothing to the ants; see symphily and synecthry.
Metopidium: the anterior declivous surface of prothorax in Membracidae.
Micans: shining: also a surface of which only parts are shining.
Microchaetae: small bristles, as opposed to macrochaetae, in Diptera.