o the same
conception.

Synthlipsis: the basal constriction of the notocephalon in Notonectids.

Syntype: = co-type; q.v.

Syringe: in Hemiptera, 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.

Testate: covered; concealed: also used as = tectiform.

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
alulae, 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 sk