Ossicle: a small nodule of chitin resembling a bone.

Ossicula: small corneous pieces that serve in the articulation of the wings to the thorax.

Ostia: the slit-like openings of the heart.

Ostiolar ca.n.a.l: a marginal furrow leading from the ostiole.

Ostiole: in Heteroptera, the openings at the sides of meso- and metathorax, through which an odoriferous fluid is excreted.

Ostium: singular of Ostia; q.v.

-osus; an affix, signifying saturation, or the possession of the quality expressed in the stem word.

Otocyst: an auditory or ear-like vesicle.

Otolith: a little ear-bone: granules or concretions found in an otocyst.

Outer lobe: of maxilla = galea; q.v.

Outer margin: the outer edge of wing, between apex and hind angle.

Ovo, Ovum: the eggs; an egg.

Ova glebata: eggs laid or concealed in lumps of dung.

Ova imposita: eggs laid in the substance that is to serve as food for the larva.

Oval: egg-shaped, with both ends similar.

Ova pilosa: eggs that are covered with hair: usually from the abdomen of the female.

Ovarian tube: a tubular structure in which are developed the cells forming the future ova: a single one of the ma.s.s which, taken together, form the ovaries.

Ovaries: a ma.s.s of ovarian tubes, lying one on each side of the body cavity of the female, in each of which tubes eggs or ova are developed: the individual tubes of an ovary all converge to one oviduct.

Ovariole: an ovarian tube: q.v.

Ovary: singular of ovaries; q.v.

Ovate: in outline, egg-shaped or oval.

Oviduct: the tube through which the egg pa.s.ses from ovarian tubes into v.a.g.i.n.a: sometimes used in the sense of ovipositor: q.v.

Oviform: egg-shaped.

Oviparous: where reproduction is through eggs laid by the female.

Oviposition: the act of depositing the eggs.

Ovipositor: the tubular or valved structure by means of which the eggs are placed; usually concealed; but sometimes extended far beyond the end of the body.

Oviscapt: = ovipositor; q.v.

Ovivalvule: in Ephemeroptera; is an appendage of the female reproductive organs.

Ovoviviparous: when living young are born from eggs which are hatched in the body of the parent.

P

Pacific coast humid area: is that faunal area of the transition zone comprising the western parts of Washington and Oregon between the Coast Mountains and Cascade range: parts of northern California and most of the coast region from near Cape Mendocino south to the Santa Barbara Mountains. To the south and east it pa.s.ses into the arid transition and in places into the upper Sonoran.

Pad: the pulvillus, or that part of it which is capable of extension and retraction in some Coleoptera.

Paddle: the flattened joints of posterior tarsi in aquatic Hemiptera.

Paedogenesis: reproduction in the s.e.xually immature or larval stage.

Paedogenetic: reproducing in the s.e.xually immature or larval stage.

Pagina: the surface of a wing: P. superior, is the upper surface; P. inferior, the lower surface: in Orthoptera, the external flattened surface of the caudal femora.

Pagiopoda: Heteroptera, in which the posterior c.o.xae are not globose and the articulation is a hinge joint: see trochalopoda.

Pagiopodous: those Heteroptera which have the c.o.xae of the hind legs hinged and the femora grooved.

Pala: the shovel-shaped tarsal joints in many aquatic Heteroptera.

Palate: = hypopharynx; q.v.

Paleace: chaff or chaffy: = paleaceous.

Paleaceous: chaffy in appearance.

Palearctic: relating to that part of the earth's surface including Europe, Africa north of Sahara, and Asia as far south as the southern edge of the Yang-tse-Kiang watershed and the Himalayas, and west to the Indus River.

Paleodictyoptera: an ordinal name suggested by Scudder for Paleozoic insects which cannot be a.s.signed to existing orders.

Paleolepidoptera: haustellate Lepidoptera in which the mandibles are distinct and the pupa is free: includes the Micropterygidae only: see protolepidoptera and neolepidoptera.

Pallescent: becoming pale or light in color or tint.

Pallette: the disc-like structure composed of three tarsal joints, on the anterior feet of male Dytiscidae.

Pallid: pale or very pale.

Pallide-flavens: pale or whitish yellow.