mst.).

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.

Medi-thorax: