Nodal furrow: in Odonata; a transverse suture, beginning at a point in costal margin corresponding to the nodus, and extending toward inner margin. Nodal sector: in Odonata; = media 2 (Comst.): arises from upper sector of arculus near nodus and extends to outer margin. Node: a knot or knob: in the plural refers to the small segment or segment between thorax and main portion of abdomen in ants. Nodiform: in the form of a knot or knob. Nodicorn: with antennae that have the apex of each joint swollen. Nodose -us: knotted or with knots; a body with one or more knotted parts a sculpture with almost isolated knots. Nodule: a little knot, lump or node. Nodulose -us -ate: with small nodes or nodules: a surface sculpture of knots or links, connected by an undulating line. Nodus: in Odonata; a stout, oblique, short vein at the place where the anterior margin of the wings is sometimes drawn in. Nopalry: a plantation of cacti for raising cochineal insects. Normal: of the usual form or type: not out of the ordinary. Notate: marked by spots: with a series of depressed marks as a sculpture. Notched: indented, cut or nicked; usually a margin. Notocephalon: in some aquatic 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.