Median carina: Orthoptera; of head, is usually applied to a median dorsal carina, but has been also used for that which extends down the middle of front from the fastigium, and then = frontal costa: of prothorax, extends along the middle of pronotum. Median cell: in Lepidoptera, is the closed area formed by a line extending from the end of subcostal to the end of the median veins, = radial (Comst.): in Hymenoptera, 1st median (Pack.), = medial (Comst.); 2d median (Pack.), - medial 4 (Comst.); 3d median (Pack.), = medial 2 (Comst.); 4th median (Pack.), = medial 1 (Comst.). Median cross-veins: in Odonata; are those which cross median space. Median foveola: in Orthoptera; the foveate depression of the vertex between the eyes: = central foveola. Median forks: in Orthoptera, refers to the forks of the median vein. Median furrow: lies between radius and media: in some Heteroptera, separates the embolium from the remainder of the corium. Median lines: on the primaries of many moths: the first or t.a. crosses about one-third from base; the second or t.p. crosses beyond the outer third and is usually sinuate. Median lobe: of labium in Odonata, is the partly divided glossa or ligula; probably corresponds to united glossa and paraglossae (Butler). Median longitudinal carinae: on the metanotum of Hymenoptera, extend one on each side of the middle. Median nervules: in Lepidoptera (Holland)1st = cubitus 2 (Comst.): 2d cubitus 1 (Comst.); 3d = media 3 (Comst.). Median notch: in Coccidae, a notch in the edge of the pygidium, at the posterior extremity of the body. Median plate: in Hymenoptera := sessiliventres, is the dorsal plate connecting the thorax and abdomen. Median sector: in Odonata, = media 3 (Comst.). Median segment: applied to the basal segment of the abdomen when it forms part of the metathorax: see propodeum. Median shade or line: in Lepidoptera, crosses at or about middle of wings. Median space: in Lepidoptera, is the area between the median lines: in Odonata, the cubital cell (Comst.); the space at base between submedian (radius) and postcosta (st anal); by Selys in 1896 and later used in the sense of medial cell of Comst. Median vein: in Odonata and Lepidoptera, = radius (Comst.): in Lepidoptera, it runs from base to about middle, nearly through centre, and is four or five branched: in Hymenoptera, it is the 3d from costal margin. Mediastinal: relating to the longitudinal median line or area. Mediastinal area: in Orthoptera, the area between median or mediastinal vein and the costal or front margin: = marginal area. Mediastinal vein: in Orthoptera and Diptera, = suhcosta (Comst.): also, in Diptera, = auxiliary vein (Meigen). Medio-eubital cross-vein: between media 4 and cubitus, connecting the two series (Comst.). Medio-ventral line: in caterpillars, extends along middle of under side. Medipectus: the under side of meta-thorax: the mesosternum. Mediproboscis: the middle third of the flexed proboscis of muscid flies.