Radial area: in Orthoptera; the space between the mediastinal (subcosta) and radial veins: see scapular area.
Radial cells: the wing area between the radius and media; often divided: in the plural (Comst.), are those cells anteriorly margined by the radius or its branches.
Radial cross vein: (Comst.), is that which divides cell, radius 1.
Radial sector: in general, the lower of the two primary divisions of the radius (Comst.): in Odonata, an indirect branch from the media, just below and parallel with media 2.
Radial vein: in Homoptera, the first important vein next the costa between it and ulnar: in Orthoptera, = radius (Comst.): in Diptera, = 2d longitudinal vein (Meigen), = radius 2 (Comst.).
Radiate veins: the longitudinal veins spreading fan-like in the anal field of secondaries: = anal veins; q.v.
Radiated: marked with lines proceeding from a common centre.
Radicle or Radicula: that joint of the antenna that is articulated to the head.
Radio-medial cross vein: connects the radial and medial systems and usually closes the radial cell (Comst.).
Radius: (Comst.); the third of the longitudinal veins starting from base and dividing into not more than five branches before reaching the margin: the branches are numbered 1, 2, 3, 4, and 5, respectively, beginning at the costal margin and extending outward and downward.