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.