Explanation of Terms Used in Entomology Part 38

Hind-intestine: = hind-gut.

Hinge: of maxilla = cardo; q.v.: the point of articulation of a movable joint.

Hips: the c.o.xa; q.v.

Hirsute: clothed with long, strong hair; s.h.a.ggy.

Hispid: bristly: spa.r.s.ely set with short, stiff hair.

Histoblast: the morphological unit or cell characteristic of a particular tissue.

Histogenesis: the formation and development of tissue.

Histolysis: the degeneration and dissolution of organic tissue.

h.o.a.ry: covered with a fine, white, silvery p.u.b.escence: pruinose q.v.

Holometabolous: having a complete transformation; with egg, larval, pupal and adult stages distinctly separated.

Holopneustic: having many pairs of open stigmata.

Holoptic: Diptera in which the eyes of male are contiguous between vertex and antennae: see dichoptic.

Holosericeus: with short, dense, silky hair, giving a satiny l.u.s.tre.

Holotype: the unique type: = type; q.v.

Homelytra: elytra of similar or equal substance.

h.o.m.o: prefix = the same; similar.

h.o.m.ochronic heredity: inheritance at corresponding periods of life.

h.o.m.ochronous: changes in an organism which appear in the offspring at the same age at which they did in the parent.

h.o.m.odynamous: serially h.o.m.ologous: h.o.m.ology of the metameres.

h.o.m.oeochromatism: applied when over a given region many b.u.t.terflies tend to vary similarly as regards color.

h.o.m.oeochrome: of the same color: see heterochrome.

h.o.m.oeomerous: all feet with an equal number of tarsal joints: = isomerous.

h.o.m.oeonomous: of the same substance or texture.

h.o.m.oetype: = h.o.m.otype; q.v.

h.o.m.ogeneous: of the same kind or nature: similar in texture or parts.

h.o.m.ogenous: similar in structure due to a community of descent.

h.o.m.ologous: implies that organs are identical in general structure and origin, though they may have developed in different ways for special purposes: see a.n.a.logous.

h.o.m.omorpha: insects in which the larvae resemble the adults.

h.o.m.onymous: pertaining to h.o.m.ology of parts arranged on a transverse axis similarly developed and of equal function.

h.o.m.onym: a name similar to or like another already used for a species in the same genus, or for a genus in the same kingdom: such names are paid to be preoccupied.

h.o.m.onymous: where the same name is applied to different conceptions.

h.o.m.ophonous: words differently written but indistinguishable in sound, applied to different conceptions.

h.o.m.oplastic: implies that organs, similar in situation and purpose, are not structurally the same, or have not the same origin.

h.o.m.optera: an ordinal term applied to those Hemiptera in which the primaries are of the same consistence throughout.

h.o.m.otenous: retaining the primitive form: applied to insects without or with an incomplete metamorphosis.

h.o.m.otype: is a specimen named by another than the author after comparison with the type.

Honey dew: a sweetish excretion produced by certain insects, notably Aphids and Coccids, and exuding from the surface of some galls.

Honey tubes: small tubes or tubercles on the abdomen of plant lice and other insects through which a sweetish liquid or honey dew is excreted siphonets; siphuncles; cornicles.

Hood: of the maxilla is the galena; q.v.: in Tingitidae the elevated portion of the prothorax, often covering the head.

Hooked hairs: = gathering hairs; q.v.

Horismology: see orismology.

Horizontal: said of wings when held parallel to the horizon.

Horn: a pointed chitinous process of the head: in the plural form applied to the antennae; q.v.

Host: the individual infested by or upon which a parasite grows: also applied to the maker of a cell or other structure in which guest flies or other insects take up their abode.

Hudsonian zone: is that part of the boreal region comprising the northern part of the great transcontinental coniferous forests. In the eastern United States restricted to the cold summits of the highest mountains, from northern New England to western North Carolina: in the west it covers the higher slopes of the Rocky and Sierra-Cascade systems.

Humeral: relating to the shoulder or humerus.

Humeral angle: in Lepidoptera, that angle of the wings at the base of costa, near the point of attachment to the body: in Coleopteran, the outer anterior angle of elytra: in Orthoptera, the obtusely rounded angle formed by the deflection of the sides of the p.r.o.notum from the dorsal.

Humeral bristles: in Diptera, are situated on the humeral callus.

Humeral callus: in Diptera, is a rounded callus forming the anterior superior angle of the mesothorax.

Humeral carina: in Coleoptera, an elevated ridge or keel on the outer anterior angle of elytra.