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. Humeral cross-vein: (Comst.); extends between the costa and subcosta close to base. Humeralis: Coleopteran; when the elytral has an angulated projecting margin at base. Humeral stripe: in Odonata, covers the humeral suture. Humeral suture: in Odonata, runs from just in front the base of the fore-wing to the edge of the median coxa, separating the mesepisternum from the mesepimeron. Humeral veins: in Lepidoptera, secondary veins on posterior wings of Lasiocampids, developed to strengthen the humeral angle. Humerus: the shoulder: in Coleopteran; the basal exterior angle of elytra: in Diptera, the anterior superior angles of the mesothorax: in Orthoptera, the femur of the fore-leg: in Hymenoptera, applied to the sub-costal vein in some groups. Humid: applied to regions in which the normal rainfall is sufficient to produce ordinary farm crops without irrigation: see arid. Hyacinthine: the purple blue of the hyacinth [between mauve and lilac]. Hyaline: vitreous: transparent or partially so. Hyaloplasm: the clear, semi-fluid material between the meshes of the cell reticulum. Hybrid: the progeny from the mating of two species. Hydradephaga; -ous: applied to aquatic, predatory pentamerous beetles with filiform antennae: see adephagous. Hydro: relating to water: a combining form used as a prefix. Hydrolysis: the chemical decomposition of a compound by water, causing formation of a new compound. Hydrophilous: applied to species living in low, damp places. Hymen: a thin plane membrane serving as a partition. Hymenoptera: membrane-winged: an ordinal term applied to insects with four membranous wings with few veins, the anterior usually larger than the posterior; mouth mandibulate; head free; thorax agglutinate, transformations complete. Hyoid: having the form of the Greek upsilon, Y Hypermetamorphosis: when an insect passes through more than the normal number of stages; the interpolated stages coming usually between the full-grown larva and adult. Hyperparasite: is a form that is parasitic upon another parasite. Hypertely: beyond the bounds of the useful: those forms whose resemblance to other objects is closer than needful, or without apparent object. Hypertrigonal space: = supra-triangular space; q.v. Hypertrophied: abnormally large or excessively developed. Hypnody: lethargy; a condition similar to or identical with hibernation. Hypertrophy: any abnormal enlargement or excessive development. Hypoblast: = entoderm. Hypocrateriform: salver-shaped. Hypodactyle: the so-called labium of Hemiptera. Hypoderm -is: the cellular layer which secretes the chitinous cuticula and in this sense = epidermis: specifically applied to the lining membrane of elytral and hemelytra.