USED IN ENTOMOLOGY. 137 



Synonymous: words of different derivation applied to the same conception. 

 Synthlipsis: the basal constriction of the notocephalon in Notonectids. 

 Syntype: co-type; q. v. 

 Syringe: in Hcmiptera, a chamber into which the salivary ducts open and by 



means of which the secretion is forced forward between the seta or lancets. 

 System: an order of arrangement. 



Systematic: in definite order, or arranged according to a system. 

 Systole : that regular contraction of the heart that sends the blood outward : 



see diastole. 



T 



T. A. line: transverse anterior line; crosses the primaries of certain moths 



one-third or less from the base : = antemedial line. 

 Tactile: used for touching; an organ that has the sense of touch. 

 Taenia: a broad longitudinal stripe. 

 Taeniate-us: with broad longitudinal markings. 

 Taenidium-ia: the band or chitinized fibre forming a part of the spiral 



thread in the trachea of insects. 

 Tail: an elongated terminal segment ,of the abdomen: the cauda in plant lice: 



elongated processes on the secondaries, in some Lepidoptera and Neuroptera. 

 Tangential: set in or meeting at a tangent; applied to ornamentation and 



processes. 



Tarsal: relating to the tarsi, or feet. 

 Tarsal lobes: membranous appendages arising from the underside of the 



tarsal joints in some Coleoptera. 

 Tarsus -i: the foot; the jointed appendage attached at the apex of tibia, 



bearing the claws and pulvilli. 

 Taste cups: specialized pits or cups, with or without a peg or hair, connected 



with ganglionated nerve cells : occur on the mouth structure and evidence 



the sense of taste. 

 Tawny: a brownish yellow, like the color of a tanned hide [pale cadmium 



yellow + Indian red]. 



Taxonomical: systematic: relating to classification. 

 Tectate: covered; concealed: also used as = tectif orm. 

 Tectiform: roof -like, sloping from a median ridge, like the primaries of 



Cicada. 

 Tegmen: a covering: sometimes used for the anterior wings in Orthoptera 



and Neuroptera. 



Tegmina: the thickened primaries serving as wing covers in Orthoptera. 

 Tegulae: small, more or less cup-like scales at the base of primaries in many 



insects; specifically in Hymenoptera: in Lepidoptera, :=the patagia or 



shoulder tippets ; but the homology is disputed ; also applied to the lappet- 

 like pieces forming the collar: in Diptera, the alulse, q. v. : the latter use is 



unfortunate and should be abandoned; the first definition should limit the 



use of the term : see aileron. 

 Tegument: a covering surface or skin. 

 Teleodont: applied to those forms of male Lucanids bearing the largest 



mandibles : see mesodont, amphiodont, priodont. 



