- Ornithodoros moubata
(a) Anterior part of venter (b) second stage nymph (c) capitulum (d) dorsal aspect of female (e) ventral aspect of female (f) ventral aspect of nymph (g) capitulum of nymph Ornithodoros moubata, the carrier of African relapsing fever, or "tick-fever," is widely distributed in tropical Africa, and occurs in great numbers in the huts of natives, in the dust, cracks and crevices of the dirt floors, or the walls. It feeds voraciously on man as well as upon birds and mammals. Like others of the Argasidæ, it resembles the bed-bug in its habit of feeding primarily at night. Dutton and Todd observed that the larval stage is undergone in the egg and that the first free stage is that of the octopod nymph. - Dermanyssus gallinæ, female
- Field Scorpion
Field Scorpion ( Buthus occitanus ): - a) top viw.-b) ventral side of the abdomen prior to: the 1st section - Pediculus showing the blind sac (b) containing the mouth parts (a) beneath the alimentary canal (p)
- Muscina stabulan
- Salivary glands of Notonecta maculata
- Dipylidium caninum. The double pored tapeworm of the dog
- Culicoides guttipennis - (a) adult, (×15) (b) head of same (c) larva (d) head (e) pupa
- Rasahus biguttatus
- Sauvage's Mason Spider
Sauvage's Mason Spider ( Cteniza fodiens ) in her home (this is greatly shortened and shown cut lengthways) .— a) Placement of eyes (greatly enlarged) .— b) Cover seen from the inside. -C) Eggs. ). - Mandible of Scolopendra cingulata showing venom gland
- The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). First stage
- The Caterpillar of the Marbled White Butterfly (Arge galathea)
- Larva of a flesh fly (Sarcophaga) - Caudal aspect - Anterior stigmata. Pharyngeal skeleton
Sarcophagidæ—The larvæ of flies of this family usually feed upon meats, but have been found in cheese, oleomargerine, pickled herring, dead and living insects, cow dung and human feces. Certain species are parasitic in insects. Higgins (1890) reported an instance of "hundreds" of larvæ of Sarcophaga being vomited by a child eighteen months of age. There was no doubt as to their origin for they were voided while the physician was in the room. There are many other reports of their occurrence in the alimentary canal. We have recorded elsewhere (Riley, 1906) a case in which some ten or twelve larvæ of Sarcophaga were found feeding on the diseased tissues of a malignant tumor. The tumor, a melanotic sarcoma, was about the size of a small walnut, and located in the small of the back of an elderly lady. - Poison apparatus of a honey bee
- Epithelium underlying poison hairs of the larva of the browntail moth
- House spider
House spider ( Tegenaria domestica ): - a) Male (below, on an enlarged scale, eyes seen from the front). b) Female - The yellow fever mosquito (Aëdes calopus)
- The Caterpillar of the Small Elephant Hawk-moth (Chærocampa porcellus)
- Left hand stigmata of the larvæ of muscoidea
- Section through a venom gland of Latrodectus 13-guttatus showing the peritoneal, muscular and epithelial layers
- Harvest mites. (Larvæ of Trombidium)
- Calliphora erythrocephala
- The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Fourth Stage
- Long-armed Tarantel Scorpion
Long-armed Tarantel Scorpion ( Phrynus lunatus ) - a) Front part of the head bust enlarged to show the arrangement of the eyes. - The Locust
Sometimes millions of locusts come upon the wind, and devour every green thing, so that nothing is left for man or beast. - Sepsis violacea; puparium and adult
Sepsis violacea; puparium and adult - Dipylidium caninum. Rostrum evaginated and invaginated
- Sarcoptes scabiei, male
- Otiobius (Ornithodoros) megnini, male. (a) dorsal, (b) ventral aspect
- 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). - House-builder Moth
Young in House, Winged Male, Young Suspended and Bag-like Female in Longitudinally-Split Cocoon. During the winter the curious weather-beaten bags of these worms may be observed hanging from the tree-branches, apparently without a trace of the odd-looking creatures that hung them there the autumn before. If a number of these bags are gathered and cut open at this time, many of them will be discovered to be empty, but the greater portion will be found partly full of yellow eggs. Those which do not contain eggs are male bags, and the empty chrysalis of the male will be found protruding from the lower extremity. Upon close examination these eggs will be observed to be obovate in form, soft and opaque, about one-twentieth of an inch in length, and surrounded by more or less fawn-colored silky down. If left to themselves, they hatch sometime in May, or early in June. - Reduvius (Opsicœtus) personatus
- 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] - 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. - Larva of Fannia scalaris
- Lucilia cæsar
- Two common centipedes
- Sarcoptes scabiei, female
- Spiny Spider
In the specimen on the tree trunk, the spider field is seen protruding like a glittering black nodule in the middle of the transversely wrinkled underside of the bright blood-red abdomen, which, in addition to the 2 long, curved thorns at the rear corners, bears 2 pairs of shorter spines, which as the spots on the back are black. The front part of the body is hairy and glossy black. - Life cycle of the malarial parasite
- Cross section of the larva of the browntail moth showing the tubercles bearing the poison hairs
- Dog flea
- The Caterpillar of the Eyed Hawk-Moth (Smerinthus ocellatus)
- Dome-like House of Cicada
Longitudinal Section Showing Pupa in Two Positions. In localities where the soil is low and swampy, a remarkable chamber is built up by the larva, where the pupa may be found awaiting the time of its change to the winged state. These chambers were first noticed by S. S. Rathvon, at Lancaster, Pa., and are from four to six inches above the ground, and have a diameter of one inch and a quarter. When ready to emerge the insect backs down to an opening which is left in the side of the structure on a level with the surface of the ground, issues forth and undergoes its transformation in the usual manner. This peculiar habit of nest-building, which is so unlike what is customary with the Cicadidæ, or with Hemiptera in general, points to a high degree of intelligence among these insects, showing a remarkable ability to adapt themselves to environing circumstances. - The Caterpillar of the Elephant Hawk-Moth (Chærocampa elpenor). Fifth Stage
- Sting of a honey bee
- Tarantula Apuliae
Apulian Tarantula ( Tarantula Apuliae ): Male - Larva of Simulium
- 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
- Beetle louse
1) Beetle louse ( Gamasus coleoptratorum ), greatly enlarged. 2) Beetle lice on the belly of a Scarab; actual size. - Linguatula. (a) larva; (enlarged). (b) adult; (natural size)
- Chrysomyia macellaria
- Notœdres cati, male and female
- Larva of Anopheles
- Head of a spider showing poison gland (c) and its relation to the chelicera (a)
- Conorhinus sanguisugus
- The Italian tarantula