Hemiptera, that part of the head which
is apparent from a dorsal aspect.

Notodont: with toothed backs: applied to a series of moths whose
larvae are more or less conspicuously humped on dorsal surface.

Notopleural suture: = dorso-pleural suture; q.v.

Nototheca: that part of the pupa covering upper surface of abdomen.

Notum: the dorsal or upper part of a segment: = tergum.

Nucha: the upper surface of the neck connecting head and thorax.

Nucleate: with, or having a nucleus.

Nucleolus: the small portion of matter in the nucleus most readily
affected by staining fluids.

Nucleus: a well-defined, differentiated, round or oval body imbedded
in the cell contents.

Nude -us: naked: a surface devoid of hair, scales or other vestiture.

Nuditas: = nudity.

Nudity: the state of being naked or bare of vestiture.

Nurses: worker ants or worker bees which care for the eggs, larvae
and pupae, but do not forage, the latter function being taken up later,
when nursing is given up.

Nutant: nodding; the tip bent toward the horizon.

Nutritive chamber: an enlarged section of ovarian tube, filled with
granular nutritive material used in developing the egg cells.

Nymph: the larval stage of insects with incomplete metamorphosis:
applies also to their pupal stage, and sometimes used as = pupa.

Nympha inclusa: = coarctate pupa; q.v.

Nymphipara: applied to insects that bear living young in an advanced
stage of development: see also pupipara.

O

Ob-: as a prefix, means inversely.

Obconic: conic, with the apex pointing downward.

Obcordate: inversely heart-shaped, with the point applied to the base
of another object or part.

Obese -us: unnaturally distended: usually applied to the abdomen.

Oblate: flattened; applied to a spheroid of which the diameter is
shortened at two opposite ends.

Oblique: any direction between perpendicular and horizontal.

Oblique vein: in Odonata; an apparent cross-vein situated between M2
and Rs, distal to the level of the nodus and inclined obliquely, from its
front end, backward and outward; in reality the basal part of Rs.

Obliterate: nearly washed out; indistinct.

Oblong: longer than broad.

Obovate: inversely egg-shaped; the narrow end downward.

Obpyriform: inversely pearshaped.

Obscure: not readily seen: not well defined.

Obsite-us: a surface covered with equal scales or other bodies.

Obsolete: nearly or entirely lost: inconspicuous.

Obtect: