USED IN ENTOMOLOGY. II3 



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 *he 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 i, 2, 3, 4, and 5, respectively, beginning at the costal 

 margin and extending outward and downward. 



Radix: base of wings, and their point of insertion : see pteropega. 



Rami -us: branches: a branch. 



Ramification: the branching out in every direction. 



Ramify: to branch out in every direction. 



Rammel-kammer : ^copulation chamber; q. v. 



Ramose -ous: branched, or having long branches. 



Rapacious: predatory: capturing and eating prey. 



Raptatory: ^raptorial: q. v. 



Raptoria: applied to that series of Orthoptera, in which the anterior legs are 

 fitted for grasping ; Mantidcr. 



Raptorial: formed for seizing prey. 



Rare: seldom seen or found. 



Rasorial: formed for scratching; applied to leg structures. 



Ravenous: greedy: voracious; hungrily. 



Receptaculum seminis: a sac or pouch-like appendage at the junction of the 

 oviducts with the vagina : it is filled during copulation and the eggs are 

 fertilized from it as they are extruded. 



Reclinate: directed backward; e. g., the bristles in Diptera. 



Reclinatus: = reflexed ; q. v. 



Reclivate: curved into a convex, then into a concave line. 



Recondite: the sting when concealed in the abdomen. 



Rectal Cauda: the terminal, tubular process or tail terminating the abdomen 

 of some (^ Hemiptera. 



Rectal glands: appendages to or thickenings of the rectum secreting a lubri- 

 cating material. 



Rectal tracheal gills: lamelliform structures in the rectum of the nymphs of 

 some Odonata. supplied with trachea and tracheoles and serving as respi- 

 ratory organs. 



Rectangular: in the form of a right or rectangle. 



Rectangulate: forming or meeting in a right angle. 



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



