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- Left spiracle of nymph of Argas persicus
- Cordylobia anthropophaga
- 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). - Pediculus vestimenti 2
- The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Second Stage
- Thirteen-Spotted Lady Beetle
- 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. - 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 ] - 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. - Some early medical entomology
- 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. - The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Full grown
- Chinch Bug
- Pediculoides ventricosus, female
- The cattle tick (Boophilus annulatus). (a) Female; (b) male
- Ixodes ricinus; male, ventral aspect
- The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Just before the second moult.
- The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Third 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. - 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. - Beetle louse
1) Beetle louse ( Gamasus coleoptratorum ), greatly enlarged. 2) Beetle lice on the belly of a Scarab; actual size. - Cærostris Mitralis, in profile
- Larva of Anopheles
- The Italian tarantula
- Epithelium underlying poison hairs of the larva of the browntail moth (larger scale)
- Tarantula Apuliae
Apulian Tarantula ( Tarantula Apuliae ): Male - 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. - Demodex folliculorum
- The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Fifth Stage
- Eggs of Anopheles
- Chrysomyia macellaria
- Locust
There has already been talk of the plague of the intestinal worms and their expulsion by Kusso; the higher standing insects occur in the highlands in large quantities only in the warmer season, but are driven back into the lower lying areas by the cold rains. The locusts , Amharic Anbasa, often cause great damage, as in the other Nile countries. - Linguatula. (a) larva; (enlarged). (b) adult; (natural size)
- Culex sollicitans. Female
- The Caterpillar of the Eyed Hawk-Moth (Smerinthus ocellatus)
- Larva of Simulium
- Conorhinus sanguisugus
- Sting of a honey bee
- Head of a spider showing poison gland (c) and its relation to the chelicera (a)
- Sepsis violacea; puparium and adult
Sepsis violacea; puparium and adult - Garden spider
Garden spider ( Epeira diadema ): - 1) Female. 2) Male. 3) Spider pipe. 4) Spinnerets with the vent opening (top) and the “strainer” (bottom). 5) Jaw blades and eyes. 6) Left jaw blade, the ground member of which is cut longitudinally to show the venom gland as a whole. 7) Top of the foot lid. 3–7 strongly enlarged. - Nest of Lasius
Neuters About Their Work. It was on an occasion while exploring a neighboring thicket for the objects of his search, that he discovered, underneath a large flat stone which he had raised, a nest of a small red ant, which he took to be the Lasius flavus of the books. The ground was covered all over with pits, and divers communicating roads, and round about were hundreds of ants, larvæ in various stages of development, pupæ and eggs, and innumerous flocks of a white aphis, all of which were being tenderly cared for by a large army of thoughtful nurses. - Dancing Mania
- Sarcoptes scabiei, female
- Life cycle of the malarial parasite
- Larva of Fannia scalaris
- Larva of Auchmeromyia luteola
The whitish larvæ on hatching are slightly flattened ventrally, and each segment bears posteriorly three foot-pads transversely arranged. At night the larvæ find their way into the low beds or couches of the natives and suck their blood. - Otiobius (Ornithodoros) megnini, male. (a) dorsal, (b) ventral aspect
- Notœdres cati, male and female
- 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). Fourth Stage
- Lucilia cæsar
- Harvest mites. (Larvæ of Trombidium)
- 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. - Two common centipedes
- Reduvius (Opsicœtus) personatus
- Conorhinus abdominalis
- Harlequin Spider
Harlequin Spider ( Salticus scenicus ): a) Female, b) Male, both enlarged. c) Female, full size, d) Front part of the head bust, seen from behind to show eye placement (enlarged). - Fight between an Ordinary Roller Spider and a Scorpion
The Roller Spider hides during the day in crevices of the loamy soil, in reed beds or under stones; at night she goes out for robbery and catches Insects. Tests on large specimens have shown that she also attacks large animals. A 52 mm Roller Spider. body length grabbed a 105 mm. long Scorpion at the root of the tail, bit it off and then devoured the whole animal. However, this victory was only due to chance, as it turned out, when a second Scorpio was brought to her and she attacked them from the front; this animal held its enemy with the claws and wounded it with the poison spine, to which it succumbed after a few convulsions. {trasnslated by Google]