Definitions For Glossary Terms

HAIR LINE
See setal line
HAIRLESS STREAK
Rarely used general term to designate either a linea calva or speculum on the forewing.
HAMULI
Curved or hook-like setae on the leading edge of the hind wing that are used to grasp the retinaculum of the forewing to couple the forewing and hind wing together during flight.
HEAD
The first or anteriormost of the three main body regions of an insect, which bears the mouthparts and major sense organs. [drawing]
HIND WINGS
Pair of wings borne on the metathorax.
HUMERAL PLATE
Basally thickened part of the forewing just beyond the tegula, which is differentiated from the rest of the wing by a constriction and which likely was derived from fusion of the bases of some ancestral veins. [drawing]
HYALINE BREAK
Term sometimes used for a small clear region or 'break' in the submarginal vein near the parastigma.
HYPOCHAETA
In Mymaridae, a long seta that projects backward from the anterior margin of the ventral surface of the forewing from within a slender membranous region in front of the marginal vein; see also macrochaeta and microchaeta. [drawing]
HYPOGNATHOUS
Position of the head if the long axis is oriented somewhat obliquely in line with the procoxae and the mouthparts are directed somewhat posteriorly; often used as a synonym of orthognathous .
HYPOPYGIUM
The last or posteriormost metasomal sternum. [drawing]
HYPOSTOMA
(pl., hypostomae) Posterior, more or less inflected portion of the head capsule on either side of and often dorsal to the labiomaxillary complex, which is delimited laterally by the hypostomal carina. [drawing] [photo][photo]
HYPOSTOMAL BRIDGE
Term used for a posteromedian region of the head between the occipital foramen and mouth cavity if delimited laterally by hypostomal carinae (see also gula and postgenal bridge). [photo]
HYPOSTOMAL CARINA
Carinate margin of the mouth cavity on the posterior surface of the head that surrounds the labiomaxillary complex. [drawing] [photo][photo]