Part 66

Hatched: closely marked with numerous short, transverse lines.

Hatching spines: = egg burster; q.v.

Haustellate: formed for sucking: applied chiefly to mouth structures.

Haustellum: a sucker: applied to that portion of the mouth of a sucking insect through which liquid food is drawn into the gullet.

Head: the first or anterior region of the insect body, articulated at its base to the thorax, bearing the mouth structures and antennae. It is now believed to be made up of seven primitive segments, named in order: 1, the ocular or protocerebral; 2, the antenna or deutocerebral; 3, second antenna or tritocerebral; 4, mandibular; 5, superlingual; 6, maxillary; 7, labial or 2d maxillary.

Head vesicle: in Diptera, = ptilinum, q.v.

Heart: the dorsal vessel or tubular structure divided into chambers, lying just beneath the dorsal, which serves to propel the blood and controls the circulation.

Heautotype: = autotype; q.v.

Helcodermatus: a surface with ulcer-like depressions: applied also to the boring or tearing spines of pupae.

Heliciform: in the form of a spiral snail shell: applied to the cases of some Trichoptera.

Helocerous: with clavate antennae.

Helvolus: tawny or dully reddish yellow.

Helvus: honey yellow [brown pink + chrome lemon].

Hemelytra: a modification of the anterior wings of Heteroptera, coriaceous at base, membranous at tip, not meeting in a straight line at the middle: more specifically applied to the corium; q.v.: also used for the tegmina of Orthoptera.

Hemi: as a prefix, means half.

Hemimeroptera: an obsolete term for Hemiptera.

Hemimetabolous: manifesting an incomplete metamorphosis, but with a marked difference between the stages: specifically the Ephemerida, Odonata and Perlidae. {Scanner's comment: nowadays applied to far more orders, generally to those that undergo a marked metamorphosis, but without a pupal stage.}

Hemiptera: half-winged: an ordinal term applied to insects in which the mouth parts consist of four lancets inclosed in a jointed beak or rostrum; metamorphosis incomplete: the primaries may be of uniform texture throughout (Homoptera) or may be thickened at base, membranous at tip (Heteroptera).

Hemispheric: like the half of a globe or sphere.

Hepaticolor: liver-brown [dragon's blood].

Hepatic pouches: applied to caeca pouches; q.v.

Herbivorous: feeding upon plant tissue: a leaf feeder.

Heremetabola: with slight or incomplete metamorphosis, but with a resting stage at the end of the nymph life; specifically the Cicadidae.

Hermaphrodite: an individual in which the characters of both sexes are combined.

Hetero: as a prefix, unequal; different from.

Heterocera: Lepidoptera in which the antenna are of any form other than clubbed at tip: opposed to Rhopalocera.

Heterochrome: of different color: applied to species in which there are two color forms of one sex, one of which is like (homoeochrome), the opposite sex, as in certain Odonata and Lepidoptera.

Heterochrony: an irregular development in point of time, a later stage becoming evident before one that is earlier in ordinary course.