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. Heterogamy: applied to those cases in which two sexual or a sexual and parthenogenetic generation alternate. Heterogeneous: a mixture of different forms; abnormal. Heterogeny: the alternation of sexual and parthenogenetic generations. Heterogyna: the ants: referring to the different kinds of females, - queens and workers, - as distinguished from males. Heteromera: Coleopteran in which the anterior and middle tarsi are 5-jointed and the posterior are 4-jointed. Heteromerous: having an unequal number of tarsal joints on the feet. Heterometabola: differing among themselves in metamorphosis; but not manifesting abrupt stages.