USED IN ENTOMOLOGY. IX ^ 



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 Orthoptcra, = 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. 

 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 Orthoptcra, in which the anterior legs are 



fitted for grasping; Mantida. 

 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: Iamelliform structures in the rectum of the nymphs of 



some Odonata, supplied with trachea and trncheoles anil serving as respi 



ratory organs. 

 Rectangular: in the form of a right or rectangle. 

 Rectangulate: forming or meeting in a right angle. 

 Rectigrade: larv?e which, having sixteen feet, walk with a rectilinear body. 



