USED IN ENTOMOLOGY. 143 



Trito-cerebral segment: see second antennal segment. 



Trite-cerebrum: the posterior portion of the brain, formed by the ganglion 

 of the third primary segment ; also termed labro-f rental lobe. 



Tri-undulate: with three waves or undulations. 



Triungulin: the first larval stage of a meloid beetle. 



Trivial: applied to a name, means specific as opposed to generic, or popular 

 as opposed to technical. 



Trivittate: with three stripes or vitta. 



Trochalopoda: Hetcroptera in which the posterior coxae are nearly globose 

 and the articulation is a ball and socket joint: see pagiopoda. 



Trochanter: a sclerite, sometimes divided, between the coxa and femur; 

 sometimes fused with the femur. 



Trochanterellus: see apophysis. 



Trochantine: the basal part of the trochanter when it is two-jointed: in 

 Colcoptcra, a piece often present on the outer side of and sometimes mov- 

 able on the coxa ; also the small sclerite connecting the coxa with the 

 sternum in Dyti-scldcc: in Neuroptera and Trichoptera the posterior sepa- 

 rated part of the coxa : in Orthoptera, a narrow longitudinal sclerite be- 

 tween mandible and gena. 



Trochiformis: cylindro-conic. 



Trochlea: the thickened base of the hind wings in Cicada: in Trichoptera, a 

 small elliptical space at base of hind wing behind origin of median vein. 



Trochlearis: pulley-shaped; like a cylinder contracted medially. 



Trochus: that part of an articulated body inserted between the joints. 



Trophi: the mouth parts collectively, including the labrum : see buccal ap- 

 pendages. 



Trophobiosis: see Symbiosis. 



Tropical: is that faunal region which covers the southern part of the penin- 

 sula of Florida, the greater part of Central America, the lowlands of 

 southern Mexico south of the tableland, and a narrow strip on each side 

 of Mexico which follows the coast northward into the United States. 



Tropico-politan: occurring in all tropical regions. 



Trumpets: breathing tubes of mosquito pupae. 



Truncate: cut off squarely at tip. 



Truncature: the truncation or point squarely cut off. 



Truncus: the trunk or thorax. 



Trunk: the thorax as a whole: the body. 



Tryptic: acting like tripsin, the proteolytic ferment of the pancreatic fluid. 



Tube: a slender, hollow, cylindrical body: specifically applied to the anal 

 siphon or respiratory tube of mosquito larvae. 



Tubercle: a little solid pimple or small chitinous button; really a ring, 

 which may or may not give rise to a seta. 



Tubercles: on the thoracic and abdominal segments of caterpillars are: an- 

 terior trapezoidal ; posterior trapezoidal ; lateral ; posterior stigmatal ; an- 

 terior stigmatal; sub-primary subventral ; pedal and adventral ; all of 

 which see. 



Tubercula: an elevated triangular process at the anterior angle of the 

 thorax; specifically in Hymenoptera. 



