USED IN ENTOMOLOGY. 115 



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 Dipt era, =2d longi- 

 tudinal 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 Diptcra. 



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



