USED IN ENTOMOLOGY. 141 



Tongue: an indefinite term, applied usually to the coiled mouth structure of 

 Lepidoptera; the lapping organ of flies; the ligula of bees and wasps, and 

 sometimes also to the hypopharynx of other insects. 



Tooth: an acute angulation : a short pointed process from an appendage or 

 margin. 



Topomorph-ic: a geographic form, variety or subspecies of a widely dis- 

 tributed species : developed by local environment. 



Topotype: is a specimen collected in the exact locality whence the original 

 type was obtained. 



Tornal: relating to or concerning the tornus. 



Tornus: in Lepidoptera, the junction of the termen and dorsum of wing: 

 = hind or anal angle ; q. v. 



Torose: swelling into knots or protuberances. 



Torpid: lying motionless by reason of cold or other natural conditions that 

 unfavorably affect the organism. 



Torqueate: with a ring or collar. 



Torquillus: = rotula. 



Tortilis: twisted. 



Tortulose -us: hump-backed; a surface with a few large elevations : beaded; 

 moniliform. 



Tortuose-us: irregularly curved and bent; snake-like. 



Tortuous: = tortuose. 



Torulus: the basal socket joint of the antenna upon which the organ is ar- 

 ticulated for movement in all directions. 



Totidem: in all parts; entirely. 



T. P. line: transverse posterior line; crossing the primaries of certain Lepi- 

 doptera, two-thirds or more from base : = post-medial line. 



Trabecula: rounded, lobular masses of the procerebrum, from which arise 

 the stalks bearing the mushroom bodies : a paired movable appendage in 

 front of the antennas in certain bird-lice. 



Trachea -se: the spirally ringed breathing tube or tubes of insects. 



Tracheal gills: the flattened or hair-like processes in aquatic larvae through 

 which oxygen is absorbed from the water. 



Tracheary: relating to or composed of tracheae. 



Tracheate: supplied with trachea: a general term applied to all articulates 

 that breathe by means of spiracular openings into a system of tubular 

 structures that extend to all parts of the body. 



Tracheation: the arrangement or system of distribution of tracheae. 



Tracheoles: the capillary trachea of the adult as they develop in masses in 

 the larva : very small, slender tracheae. 



Transection: a cut across, at right angles to the body: transverse section. 



Transition zone: is the transcontinental belt in which the austral and boreal 

 elements overlap: it is divided into a humid or Alleghanian area; a western 

 arid area ; and a Pacific Coast humid area : all of which see. 



Transitory: lasting for a short time only. 



Translucent: semi-transparent; admitting the passage of light but not o 

 vision. 



