Part 125

Rectal tracheal gills: lamelliform structures in the rectum of the nymphs of some Odonata, supplied with trachea and tracheoles and serving as respiratory organs.

Rectangular: in the form of a right or rectangle.

Rectangulate: forming or meeting in a right angle.

Rectigrade: larvae which, having sixteen feet, walk with a rectilinear body.

Rectilinear: in the form of a straight line.

Rectum: a chamber, variable in size and form, just within the anus, in which the excretions are formed or molded for expulsion from the body:= cloaca.

Rectus: right or straight.

Recumbent: lying down; reclining.

Recurrent: running backward: applied to nerves it = stomatogastric.

Recurrent nervure: in Hymenoptera (Nort.), is the medial cross vein (Comst.), from the point of branching to the junction.

Recurrent vein: in Hemerobiidae, the first branch of the subcosta when it recurves toward the base of the wing.

Recurved: bowed backward.

Reductus: a zig-zag marking or corrugation.

Reflected or Reflexed: angularly bent backward.

Refracted: bent back as if broken.

Region: a space or area adjoining a specified point: a part of the body composed of a number of segments, as the head, the thorax, or the abdomen.

Rejuvenescence: a renewal of youth; bringing back to a condition of youth.

Remote: further removed than distant.

Reniform: kidney-shaped: applied to a macula approximating that shape, found at the end of median cell in many moths.

Repand: wavy; with alternate segments of circles and intervening angles.

Replicate: wings folded back upon the base; like the secondaries in Coleoptera.

Replicatile: capable of being folded back.

Repugnatorial: serving to repel: so offensive as to drive away: applied to glands that secrete an offensive material.

Reservoir: a case or cavity for the storage of any fluid or secretion.

Resilient: elastic; having the property of springing back.

Respiration: breathing or taking breath: union of oxygen with tissues and liberation of carbon dioxide from same.

Restricted: held back: confined to a limited area.

Resupinate: upside down; horizontally reversed.