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- Eggs of Anopheles
- Demodex folliculorum
- Pediculoides ventricosus, female
- The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Third Stage
- Conorhinus abdominalis
- The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Just before the second moult.
- Agalena and Her Funnel-Web
Agalenidæ, as our funnel-web weavers are called, are long-legged, brown spiders, in which the head part of the cephalo-thorax is higher than the thoracic part, and distinctly separated from it by grooves or marks at the sides. The eyes are usually in two rows, but in Agalena the middle eyes of both rows are much higher than the others. The feet have three claws, and the posterior pairs of spinnerets are two-jointed and usually longer than the others. Agalena nævia, the technical name of our Common Grass Spider, abounds in all parts of the United States, but its very commonness is the principal reason why it is so little known except by the trained naturalist, its very familiarity leading the average man and woman to look upon it with contempt. - The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Full grown
- A solpugid (Eremobates cinerea)
The Solpugida have long borne a bad reputation and, regarding virulence, have been classed with the scorpions. Among the effects of their bites have been described painful swelling, gangrene, loss of speech, cramps, delirium, unconsciousness and even death. Opposed to the numerous loose accounts of poisoning, there are a number of careful records by physicians and zoölogists which indicate clearly that the effects are local and though they may be severe, they show not the slightest symptom of direct poisoning. - Long-tailed thread scorpion
With the Scorpions ( Thelyphonidae)) the three last abdominal members are narrow and form a short tube, which ends in a long, multifaceted thread with a stink gland. The whip is relatively short and 8-membered. The jaw gauges are thick, stocky and scissor-shaped at the end. The depicted species inhabits Java and Timor and is 32 mm without the tail. - Cærostris Mitralis, in profile
- Chinch Bug
- Some early medical entomology
- Common Tiger Beetle
Larvæ in Burrows. Two Other Species in Background. They are true children of the earth. The eggs are laid in the earth, and in the earth the grubs are hatched, and in the earth they spend their days, and in the earth they prepare their shrouds, and, wrapped therein, sleep their pupa-sleep through the long, dreary winter, and with the returning warmth of spring crawl out of their earthy chambers to run and sport on earth, seldom using their new-formed wings to fly away from their beloved mother. - Culex sollicitans. Female
- Pseudargiolus Butterfly
Larva Feeding on Bud of Black Snakeroot, and Guarded by Ants. But now comes the most remarkable part of the larval history of Pseudargiolus. The whole upper part of the larva is covered with small, glassy, star-shaped processes, scarcely raised above the surrounding surface, from the centre of which spring short, filamentous bodies, bristling with feathery-looking tentacles, which the caterpillar has the power of protruding at will. It throws them out like the tentacles of Papilio or the horns of snails. More singular still is an opening upon the eleventh segment, placed transversely and surrounded by a raised cushion, about which the granulations that cover the body of the caterpillar are particularly dense. From the middle of this opening, which is shaped like a button-hole, issues, at the caterpillar’s will, a sort of transparent, hemispherical vesicle, from which is emitted a good-sized drop of fluid, which the animal is capable of reproducing when absorbed. - The cattle tick (Boophilus annulatus). (a) Female; (b) male
- Ixodes ricinus; male, ventral aspect
- Wreathed Weaving Spider
The Wreathed Weaving Spider ( Theridium redimitum), which occurs quite commonly, especially in gardens, becomes at most 5 mM. long; this fat little spider inhabits all kinds of low-growing herbs and shrubs; here it spins (fig. 1) a few leaves together by irregularly oriented threads, on which the small animals that make up its food stick to. The mother attaches the spherical, bluish egg sac to a leaf (fig. 2), keeps watch next to it until the young have hatched, and continues to do so for the few days of their cohabitation. These beautiful spiders are very variable in color and drawing. Transparent and almost white in their early youth, spotted black only on the back of the abdomen; towards the end of June, in July and in August, they have taken on a pale yellow color, some plain, others with a stain on the abdomen, which can be pure pinkish red or partially greenish, circular or oval. In addition, the rim and a line across the center of the head-breast, 6 pairs of round dots on the abdomen, the tip of the probes and the shins are black. grab. [As translated from the Dutch by online translator ] - Common Water Spider
The female lays eggs in a bubble, which, covered with a double layer of silk and deformed into a more or less flat bulb, is hung on a water plant or in the diver's bell and carefully monitored. - Cimex lectularius
- Leaf-Cutter Bee at Work
Two Tunnels Being Filled With Leaf-Cells. You should see the little creature in her never-tiring work of preparing material for her nest. In and out among the roses she goes, examining each leaf with the most critical care, and only desisting from her labor when a suitable one has been chosen. She scans it over and over, and at last from a position on its upper or nether surface proceeds to cut a piece just fitted for her work, which, heavy as it seems, is seized between the legs and jaws and carried on swiftly-agitated wings to her burrow. Ten pieces or more, each differing in shape, are cut and borne away, which the ingenious insect tailor twists and folds, the one within the other, until is formed a funnel-like cone, whose end is narrower than its mouth. So perfectly joined are the parts, that even when dry they have been found to retain their form and integrity. A cake of honey and pollen, for the use of some yet unborn Leaf-cutter, is deposited within, and on this, in due time, is laid a single small egg. Nought now remains but to wall up the cell. A circle of leaf, of the size of the opening, is cut, and this is closely adjusted within the wall of rolled-up leaves. Sometimes as many as four pieces are thus utilized. A second cell, similarly built, is fitted to the first, and this is succeeded by eight or ten others. When all is completed, the eggs being laid and the cells all victualled, the hole of the shaft is closed with the earth that was thrown out, and so carefully, too, that not a trace of her doings remains to tell us the story. - The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Second Stage
- Relationship between a mature plant of Herpomyces stylopygae and the integument of Blatta orientalis
Diagram illustrating the relationship between a mature plant of Herpomyces stylopygae and the integument of Blatta orientalis. Richards and Smith have studied the life history of Herpomyces stylopygae on the oriental cockroach. The plants grow only on living cockroaches, and the infection is disseminated by contact. - Thirteen-Spotted Lady Beetle
- Cordylobia anthropophaga
- Chrysalis of Tomato Worm
- Left spiracle of nymph of Argas persicus
- Representative Protozoa associated with cockroaches
Representative Protozoa associated with cockroaches. A, Monocercomonoides melolonthae, X 3094 (after Grassé). B, Coelosporidium periplanetae, X 1310 (after Sprague); trophozoite with spores and chromatoid bodies. C, Endamoeba blattae, X 273 (after Kudo); trophozoite. D, Lophomonas striata, X 330 (after Kudo). E, Lophomonas blattarum, X 660 (after Kudo). F, Retortamonas blattae, X 3094 (after Wenrich). G, Nyctotherus ovalis, X 175 (after Kudo). H, Gregarina rhyparobiae, c. X 52: mature trophozoite attached to intestinal wall of Leucophaea maderae. (Redrawn from J. M. Watson [1945].) I, Diplocystis schneideri, c. X 14.4 (after Kunstler). J, Gregarina blattarum, c. X 57 (after Kudo). K, Protomagalhaesia serpentula, X 36 (after Pinto). L, Gamocystis tenax, magnification not known (after Schneider). - Two birds watching a bug
- Pediculus vestimenti 2
- Pigeon tick
Pigeon tick ( Argas reflexus ) seen from the back and from the ventral side, enlarged. The top is rusty yellow, the bottom is yellowish-white (as is the edge of the body and legs), unless the food channel is filled with a colored substance. - Freshly hatched larva of Julus multistriatus
Freshly hatched larva of Julus multistriatus? 3 mm. long: a, 5 pairs of rudimentary legs, one pair to a segment. - Mourning-Cloak Butterfly
Larva Feeding on Willow Leaf, and Chrysalis Suspended from Twig. - Protozoa from the gut of the wood-feeding cockroach
Protozoa from the gut of the wood-feeding cockroach Cryptocercus punctulatus. A, Eucomonympha imla, female above, male below, c. X 375. (From Cleveland [1950c].) B, Barbulanympha sp. (From Cleveland [1953].) C, Urinympha talea, c. X 712. (From Cleveland [1951a].) D, Rhynchonympha tarda, c. X 450. (From Cleveland [1952].) E, Trichonympha okolona or T. algoa, c. X 390. - Echidnophaga gallinacea
- The cockroach mite
The cockroach mite, Pimeliaphilus podapolipophagus - Chiasognathus Grantii 2
- Newborn Cicada
Although Cicadas abound most upon the oaks, yet there seem to be no trees or shrubs that are exempt from their attacks, unless it be the various species of pines and firs. The punctured limbs languish and die soon after the eggs are laid, and as often happens are broken off by the winds; but when this is the case the eggs never hatch, for the moisture of the living branch seems necessary for their proper development. The eggs are one-twelfth of an inch in length, and one-sixteenth of an inch through the middle, but taper to an obtuse point at each end. They are of a pearl-white color. The shell is so thin and delicate that the form of the inclosed insect can be seen before the egg is hatched. One writer claims that fifty-two days, and others that fourteen days, constitute the period required for the hatching of the egg. When it bursts the shell the young insect is one-sixteenth of an inch long, and is of a yellowish-white color, excepting the eyes and the claws of the fore-legs, which are reddish. It is clothed with small hairs. In form it is grub-like, larger proportionally than the parent, and provided with six legs, the first pair being very large, shaped like lobster-claws, and armed beneath with strong spines. Little prominences take the place of wings, and under the breast is a long beak for suction. Its movements, after leaving the egg, are very lively, and nearly as quick as some of the ants. - Lepismas at Work
Living in chinks and crannies of ranges in our homes, and occasionally in bookcases and closets where glutinous and sugary matters abound, but which has probably not been met with elsewhere, is a strange but beautiful little creature which, as far as can be determined, goes through the brief round of its existence without a name to distinguish it from its fellows. Few entomologists have given any special attention to its family relationships. The possession of certain bristle-like appendages which terminate the abdomen, and which are no doubt comparable with the abdominal legs of the Myriopods, or Thousand Legs, classes it with the Bristle-tails, or Lepismas. In general form, a likeness to the larva of Perla, a net-veined neuropterous insect, is manifest, or to the narrow-bodied species of Blattariæ, or Cockroaches, when divested of wings. - Common Cockroach
(Blatta orientalis). a, female; b, male; c, side view of female; d, young. After Marlatt, Entom. Bull. 4, U.S. Dept. Agric. The young creature is hatched from the egg in a form closely resembling, on the whole, that of its parent, so that the term 'miniature adult' sometimes applied to it, is not inappropriate. The baby cockroach is known by its flattened body, rounded prothorax, and stiff, jointed tail-feelers or cercopods; the baby grasshopper by its strong, elongate hind-legs, adapted, like those of the adult, for vigorous leaping. - Centipede
- Larva of Pulex irritans
- Insect frame
- Pupa of flea
- American Luna Moth
Larva on Branch Below, and Cocoon on Twig Just Above. No insect affords a better proof of high art in nature, and of the transcendent beauty of the Creator’s thoughts, than the Luna moth, which is as preëminent above her fellows as her namesake, the fair empress of the sky, above the lesser lights that dominate the night. Her elegant robes of green, set off with trimmings of purple, and jewelled with diamonds, added to her queenly grace and personal charms, will always distinguish her from the profanum vulgus of the articulata. - Culicoides guttipennis - mouth parts of adult
Of the twenty or more species of this genus occurring in the United States the following are known to bite: C. cinctus, C. guttipennis, C. sanguisuga, C. stellifer, C. variipennis, C. unicolor. - Cockroach (Roach)
- Bees
The figure is a very accurate representation of the Queen, the Worker and the Drone. - Pediculus vestimenti
- Brachinus Pursued by an Enemy
His Curious and Unique Method of Defence. But it is not so much his odd shape as a most extraordinary property he possesses, which is singularly unique in the animal kingdom, that makes him an object of interest and curiosity. Deep down in his most marvellous body a fluid, highly volatile in its nature, is elaborated, which the little creature can retain or expel at his pleasure. It is only, however, when alarmed that he utilizes this fluid in small quantities in defense, but its effect is wonderful, for in coming into contact with the atmosphere it immediately volatilizes and explodes, looking very much like a discharge of powder from a miniature artillery. In consequence of this phenomenon the insect which produces it is popularly called the Bombardier Beetle. - Butterfly and flower frame
- Insect Frame 3
- Violacea Butterfly
Larva, Protected by Ants, Feeding on Flower-buds of Dogwood. Why this species, and doubtless many others of its family, are thus favored, will soon be apparent. Ants may be seen wherever these larvæ may be found, ever ready to receive the honeyed secretion when it pleases the little creatures to eject it, but all the while exercising the closest vigilance lest some wary ichneumon may come along and deal a thrust of its ovipositor, which means misery and ultimate death to their helpless friends. So intent is the larva, with its head buried in the flower, upon its feeding, and so quietly and stealthily does the ichneumon approach its intended victim, that hardly a single individual would be left to tell the story of its existence were it not for the ants. The larvæ know their protectors, it would seem from their actions, and are able and willing to reward their services. The advantage is mutual, and the association friendly. No compelling by rough means on the one part is noticeable, and no reluctant yielding on the other. All demonstrations made by the ants are of the most gentle character. They caress, entreat, and as they drink in the sweet fluid, lifting their heads to prolong the swallowing, they manifest to the utmost their satisfaction and delight. It is amusing to see them lick away the last trace, caressing the back of the segment with their antennæ as they do so, as though they were coaxing for a little more. - Agalenidæ
Long-legged, brown spiders, with two spinnerets longer than the others, and extending out behind the body. Figure is Agalena nævia, the common grass spider. They make flat webs, with a funnel-shaped tube at one side, in which the spider waits. - Newly hatched young of Cimex lectularius
- Seventeen-year Cicada
Adult, Chrysalis-Case, Pupa, Entrances to Burrows and Egg-Nests. In the winged state Cicada septendecim is of a black color, with transparent wings and wing-covers, the thick anterior edge and veins of which being orange-red. Near the tips of the latter there is a dusky zig-zag line which resembles in shape the letter W. The eyes, when living, are also red, while the legs are a dull orange, which color is conspicuous along the edges of the rings of the body. The wings expand from two and a half to three and a quarter inches. - Butterfly frame
- Every good mother should be the honored queen of a happy family
The group of bees represents the attitude in which the bees surround their Queen or Mother as she rests upon the comb. - Culex larva showing details of external structure
The larvæ are elongate, with the head and thorax sharply distinct. The larval antennæ are prominent, consisting of a single cylindrical and sometimes curved segment. The outer third is often narrower and bears at its base a fan-shaped tuft of hairs, the arrangement and abundance of which is of systematic importance. About the mouth are the so-called rotary mouth brushes, dense masses of long hairs borne by the labrum and having the function of sweeping food into the mouth. The form and arrangement of thoracic, abdominal, and anal tufts of hair vary in different species and present characteristics of value. On either side of the eighth abdominal segment is a patch of scales varying greatly in arrangement and number and of much value in separating species. Respiration is by means of tracheæ which open at the apex of the so-called anal siphon, when it is present. In addition, there are also one or two pairs of tracheal gills which vary much in appearance in different species. On the ventral side of the anal siphon is a double row of flattened, toothed spines whose number and shape are likewise of some value in separating species. They constitute the comb or pecten.