Part 76

Introse -um: directed inward, toward the body.

Intrusus: seemingly impressed with a sharp point.

Intumescent: enlarged; swollen: expanded.

Invaginate: when a tubular or vesicular part is turned inward or retracted within the body wall.

Invagination: a pouch or sac formed by an infolding or indrawing of the outer surface.

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.