144 EXPLANATION OF TERMS 



Tuberculate -ose: formed like a tubercle: a surface covered with tubercles. 



Tubercule -ulum: a small tubercle. 



Tuberculiform: shaped like a pimple or tubercle. 



Tuberculose -ous: covered or set with tubercles. 



Tubulifera: Hymcnoptcra, in which the terminal segments of abdomen are 

 retracted, but may be extended, tube-like : Thysanoptera in which there is 

 no ovipositor and the terminal segments of abdomen are tubular. 



Tubulous-ose: formed like a tube: fistulous. 



Tubulus: the slender, flexible abdominal segments forming the ovipositor in 

 Diptera. 



Tubus: a term used to designate the corneous base of a ligula: the sheath 

 of the tongue. 



Tumescence: a swelling or tumid enlargement: a puffed-up area. 



Tumescent: a little swollen or puffed up. 



Tumid: swollen; enlarged; puffed up. 



Tunica intima: the inner layer of the silk glands: an inner lining or mem- 

 brane. 



Tunica propria: a layer of epithelial cells and connective tissue lining the 

 interior of the hind gut : the outer layer of the silk glands : a covering or 

 investing membrane. 



Tunicate: composed of concentric layers, enveloping one another: said of 

 antennae when each successive joint is buried in the preceding funnel- 

 shaped one. 



Turbinate: top-shaped; nearly conical: differs from pyriform in being 

 shorter and more suddenly attenuated at base : applied to an eye = pillared 

 eye; q. v. 



Turgid: swollen. 



Turritus: towering: a surface rising cone-like. 



Tylo: =tylus ; q. v. 



Tylus: the anterior central lobe of the head in Hemiptera. 



Tympana: the ears in Orthoptera. 



Tympanal: applied to organs covered with a tympanum or stretched mem- 

 brane supposed to function as ears. 



Tympanic spiracle: in Diptera, the thoracic spiracle at base of wing. 



Tympanules: small openings covered by a membrane, having otoliths and 

 serving as ears. 



Tympanum: any membrane stretched like the head of a drum: specifically 

 applied to the membrane covering the auditory organs in Orthoptera. 



Type: a unique or single specimen selected from a series and labelled by the 

 describer to represent his name and description : if c? or $ be added to the 

 label, the specimen typifies that sex, and in case of an erroneous association 

 the male type stands for the species unless the author has specifically des- 

 ignated the other example as representing the name: see also co-type; 

 homotype; metatype; paratype; topotype. 



Typical: the normal or usual form of a species ; agreeing with the type form. 



