Investitus: unclothed: a surface without scales or hair.

Involucrate: = involute.

Involucrum alarum in Dermaptera a flap of the metanotum.

Involute: spirally rolled inwardly.

Involuti: butterflies whose larvae live in a folded leaf; Hesperidae.

Iridescent: a surface which reflects the prismatic hues.

Iridicolor: any color so broken up as to reflect the prismatic hues.

Iris: the circle which, in an ocellate spot surrounds the pupil.

Irised: with rainbow colors.

Iris-pigment: = iris tapetum.

Iris tapetum: the pigment layer of the compound eye just below the
crystalline cone.

Irregular: unequal, curved, bent or otherwise twisted or modified
without order or symmetry, e.g. certain antennae.

Irrorate: marked with minute points; freckled.

Isabelline -us: pale yellow with some red and brown [chronic lemon
with a little carmine and roman sepia].

Ischia: = pleura; q.v.

Iso-: equal.

Isolate: to separate out from others; occurring alone.

Isomers: that series of Coleoptera in which the tarsi have an equal
number of joints on all feet.

Isomerous: with equal number of tarsal joints on all
feet := homoeomerous.

Isomorphous: having the same form, appearance or construction.

Isopalpi: that series of Trichoptera in which the palpi of both sexes
have the same number of joints.

Isoptera: equal winged: an ordinal term for insects with four, similar,
net-veined wings; mouth mandibulate; thoracic rings similar, loosely
jointed metamorphosis incomplete: the Termitidae. {Scanner's note: In
modern nomenclature the Isoptera constitute the order of all termites;
the Termitidae are just one family within the Isoptera.}

Isotypical: a genus described from more than one species, all of which
are congeneric.

-itus: = -atus; q.v.

-ius: suffix; having the power or ability to.

J

Jabot: the crop; q.v.

Janthine: violet colored.

Jaw-capsule: contains the mouth structures in those dipterous larvae
in which the head is differentiated.

Johnston's organ: a complex nervous structure in the basal joint of
dipterous antennae.

Joint: a segment or part between two incisures: an articulation.

Jubate -us: fringed with long pendent hairs.

Juga: the lateral anterior lobes of the head of a Heteropteron; each
side of the tylo.

Jugatae: that series of Lepidoptera in which there is a jugum instead
of a frenulum to unite the wings in flight.

Jugular: of or pertaining to the throat.

Jugula