ClipArt ETC
Branch of a Chara

Chara

Branch of a Chara

Outlines of a portion of the stem in section, showing the central cell and the outer or cortical cells.

Chara

Outlines of a portion of the stem in section, showing the central cell and the outer or cortical cells.

A piece of the rose-red Delesseria Lepreiurei

Delesseria Lepreiurei

A piece of the rose-red Delesseria Lepreiurei

A piece of the rose-red Delesseria Lepreiurei, showing that it is composed of a layer of cells.

Delesseria Lepreiurei

A piece of the rose-red Delesseria Lepreiurei, showing that it is composed of a layer of cells.

A piece of the rose-red Delesseria Lepreiurei, showing the cells are gelatinous and thick-walled.

Delesseria Lepreiurei

A piece of the rose-red Delesseria Lepreiurei, showing the cells are gelatinous and thick-walled.

Closterium acutum, a common Desmid. It is a single firm-walled cell, filled with green protoplasmic matter.

Desmid

Closterium acutum, a common Desmid. It is a single firm-walled cell, filled with green protoplasmic…

View of three stages of the conjugation

Desmid

View of three stages of the conjugation

Stage of a species of Botrydium, a globose cell.

Botrydium

Stage of a species of Botrydium, a globose cell.

Full-grown plant, extended and ramified below in a root-like way.

Botrydium

Full-grown plant, extended and ramified below in a root-like way.

A Vaucheria; single cell grown on into a much-branched thread; the end of some branches enlarging, and the green contents in one (a) there condensed into a spore.

Vaucheria

A Vaucheria; single cell grown on into a much-branched thread; the end of some branches enlarging, and…

A Vaucheria; spore and the mature spore escaping.

Vaucheria

A Vaucheria; spore and the mature spore escaping.

Bryopsis plumosa; apex of a stem with its branchlets; all the extension of one cell.

Bryopsis Plumosa

Bryopsis plumosa; apex of a stem with its branchlets; all the extension of one cell.

A stone on which various Lichens are growing, such as (passing from left to right) a Parmelia, a Sticta, and on the right, Lecidia geographica, so called from its patches resembling the outline of islands or continents as depicted upon maps.

Lichens

A stone on which various Lichens are growing, such as (passing from left to right) a Parmelia, a Sticta,…

Piece of thallus of Parmelia conspersa, with section through an apothecium.

Parmelia

Piece of thallus of Parmelia conspersa, with section through an apothecium.

Section of a smaller apothecium.

Apothecium

Section of a smaller apothecium.

Two asci of the same, and contained spores, and accompanying filaments.

Lichens

Two asci of the same, and contained spores, and accompanying filaments.

Piece of thallus of a Sticta, with section, showing the immersed apothecia; the small openings of these dot the surface.

Sticta

Piece of thallus of a Sticta, with section, showing the immersed apothecia; the small openings of these…

Cladonia coccinea; the fructification is in the scarlet knobs, which surround the cups.

Cladonia

Cladonia coccinea; the fructification is in the scarlet knobs, which surround the cups.

Two of the asci and contained double spores, quite like those of a Lichen

Lichen

Two of the asci and contained double spores, quite like those of a Lichen

A species of Botrytis.

Botrytis

A species of Botrytis.

Eriosoma Tesselata was found on birch in Maryland, in clusters near the ends of twigs, in the autumn. It is of a black color, with white spots on the fore part of its body, and is covered with a snow white down or wool on its hinder part.

Wooly Aphid

Eriosoma Tesselata was found on birch in Maryland, in clusters near the ends of twigs, in the autumn.…

A grape-vine leaf gall-louse. The insect forms galls on the under side of the grape-vine leaves, and although they appear to do comparatively little injury to the vine, they are extremely interesting to vine-growers.

Fitch

A grape-vine leaf gall-louse. The insect forms galls on the under side of the grape-vine leaves, and…

Phylloxera Vastatrix, a grape-vine-root gall-louse, is by many entomologists supposed to be another form of the Pemphigus vitifoliae above mentioned, but that, instead of living above ground and forming hollow bag-like galls on the leaves, it lives under-ground on the roots, upon which it forms knotty swellings or galls.

Grape-Root Louse

Phylloxera Vastatrix, a grape-vine-root gall-louse, is by many entomologists supposed to be another…

Cysts on a living rose leaf.

Cysts

Cysts on a living rose leaf.

Cysts on a living rose leaf.

Cysts

Cysts on a living rose leaf.

Cysts on a living rose leaf, sectional view.

Cysts

Cysts on a living rose leaf, sectional view.

Spores and cysts on a living rose leaf.

Cysts

Spores and cysts on a living rose leaf.

An image of spores.

Spores

An image of spores.

Plate-like covering of white grubs.

Spiracles

Plate-like covering of white grubs.

The Southern Katydid, Microcentrum laurifolium- 1, the female adult; 1a, eggs laid on leaves and twigs of orange; 1b, the young katydids; 2b, parasites on the eggs.

Katydid

The Southern Katydid, Microcentrum laurifolium- 1, the female adult; 1a, eggs laid on leaves and twigs…

Lecanium Hemisphericum on orange-leaves; a, female scale.

Lecanium Hemisphericum

Lecanium Hemisphericum on orange-leaves; a, female scale.

Aleyrodes Citri, male from side showing waxy tufts.

White Fly

Aleyrodes Citri, male from side showing waxy tufts.

Aleyrodes Citri, adult female.

White Fly

Aleyrodes Citri, adult female.

Aleyrodes Citri, her ovipositor.

White Fly

Aleyrodes Citri, her ovipositor.

Aleyrodes Citri, the head from the side.

White Fly

Aleyrodes Citri, the head from the side.

Aleyrodes Citri, antenna

White Fly

Aleyrodes Citri, antenna

Aleyrodes Citri, costal border of wing.

White Fly

Aleyrodes Citri, costal border of wing.

Aleyrodes Citri, hind tarsus.

White Fly

Aleyrodes Citri, hind tarsus.

Aleyrodes Citri, hind tibia.

White Fly

Aleyrodes Citri, hind tibia.

Elm-leaf beetle, Galeruca xanthomelaena; a, egg patches on leaves; b, larva feeding; c, adult feeding.

Beetle

Elm-leaf beetle, Galeruca xanthomelaena; a, egg patches on leaves; b, larva feeding; c, adult feeding.

White-pine weevil of the Pissodes strobi species.

Weevil

White-pine weevil of the Pissodes strobi species.

White-pine weevil of the Pissodes strobi species; pupa.

Weevil

White-pine weevil of the Pissodes strobi species; pupa.

White-pine weevil of the Pissodes strobi species; larva.

Weevil

White-pine weevil of the Pissodes strobi species; larva.

Paleacrita vernata species; male.

White-Spotted Cankerworm Moth

Paleacrita vernata species; male.

Paleacrita vernata species; female.

White-Spotted Cankerworm Moth

Paleacrita vernata species; female.

Paleacrita vernata species; structural detail.

White-Spotted Cankerworm Moth

Paleacrita vernata species; structural detail.

Paleacrita vernata species; structural detail.

White-Spotted Cankerworm Moth

Paleacrita vernata species; structural detail.

Nemorea leucaniae species, Tachinid on cut-worms; white eggs on the anterior segments of the caterpillar.

Fly

Nemorea leucaniae species, Tachinid on cut-worms; white eggs on the anterior segments of the caterpillar.

A squirrel hiding in a tree from the rain.

Squirrel

A squirrel hiding in a tree from the rain.

Currant-worm, <em>a</em>male and female adult and <em>b</em>larvae.

Currant Worm

Currant-worm, amale and female adult and blarvae.

A leaf-cutter bee, Megachile species. Segments of leaves cut from leaf-cutter bee.

Leaf-Cutter Bee

A leaf-cutter bee, Megachile species. Segments of leaves cut from leaf-cutter bee.

A leaf-cutter bee, Megachile species. Leaves cut from leaf-cutter bee in a burrow in a dead branch.

Leaf-Cutter Bee

A leaf-cutter bee, Megachile species. Leaves cut from leaf-cutter bee in a burrow in a dead branch.

Camelia sinensis is the tea plant, the plant species whose leaves and leaf buds are used to produce tea.

Tea

Camelia sinensis is the tea plant, the plant species whose leaves and leaf buds are used to produce…

Upper end of stem, showing leaves of asparagus.

Asparagus

Upper end of stem, showing leaves of asparagus.

Camphor is a white transparent waxy crystalline solid with a strong penetrating pungent aromatic odor.

Camphor

Camphor is a white transparent waxy crystalline solid with a strong penetrating pungent aromatic odor.

"The great shearwater reaches a length of eighteen inches, is white beneath, and is generally distributed throughout the Atlantic Ocean."&mdash;Finley, 1917

Great Shearwater

"The great shearwater reaches a length of eighteen inches, is white beneath, and is generally distributed…

"A crumb of soil (magnified). The white spaces represent air."&mdash;Finley, 1917

Crumb of soil

"A crumb of soil (magnified). The white spaces represent air."—Finley, 1917

"The common sorrel is a meadow plant, slender in habit, with halberd-shaped, juicy, acid flavored leaves, and bearing whorled spikes of greenish-red flowers in summer."&mdash;Finley, 1917

Sorrel

"The common sorrel is a meadow plant, slender in habit, with halberd-shaped, juicy, acid flavored leaves,…

"The Japanese spaniel, sometimes called the 'sleeve dog', is black and white in color; coat massive and very silky; tail tightly curled over its back, with flowering plume; very diminutive, some specimens weighing under four pounds."—Finley, 1917

Japanese Spaniel

"The Japanese spaniel, sometimes called the 'sleeve dog', is black and white in color; coat massive…

"The common spindle tree (<em>Euonymus europaeus</em>) is a European shrub, which bears glossy lanceolate leaves, and in late spring clusters of small greenish flowers, followed by fruits which become beautifully rose colored."—Finley, 1917

Spindle Tree

"The common spindle tree (Euonymus europaeus) is a European shrub, which bears glossy lanceolate…