Part 86

Mecaptera: = Mecoptera, q.v.

Meconium: the substance excreted by certain metabolic insects soon after their emergence from the chrysalis or pupa.

Mecoptera: long-winged: neuropterous insects with similar, large, unfolded wings; mouth mandibulate, prolonged into a beak: head free; thorax agglutinated; transformations complete: the scorpion flies or Panorpidae. Medi-: prefix, = middle.

Media: the fourth of the longitudinal veins extending from base through approximately the middle of the wing, not more than four branched, the branches numbered on margin from nearest apex, to 4 nearest anal angle: in Orthoptera; it is the median or externomedian: in Lepidoptera (Pack.), is cubitus (Comst.).

Mediad: toward the median plane or middle.

Mediafurca: a process extending internally from the meso-sternum, to which the muscles are attached.

Medial: referring to, or at the middle.

Medial cells: (Comst.), are anteriorly bounded by the media or its branches: in Hymenoptera (Mort.), includes median and cubital (Comst.)

Medial cross-vein: (Comst.), is between media 2 and 3.

Median 1: in Lepidoptera (Pack.), = media 2 (Comst.).

Median 2: in Lepidoptera (Pack.), = media 3 (Comst.).

Median 4: in Lepidoptera ( Pack.), = cubitus 2 (Comst.).

Median area: of wings in Orthoptera, lies between the radial and ulnar veins, radius and media (Comst.): of meta-thorax of Hymenoptera, is the middle of the dorsum, divided into three spaces or cells; 1st or basal area, 2d or Lipper median or areola; 3d or apical or petiolar area.

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.